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Re: Synthetic vs. conventional oil?
[Re: CompSyn]
#605548
02/13/10 09:21 PM
02/13/10 09:21 PM
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Joined: Feb 2009
Posts: 2,034
NW Indiana
deansrr
top fuel
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top fuel
Joined: Feb 2009
Posts: 2,034
NW Indiana
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Quote:
Quote:
CS, please give your opinon on high mileage oils, such as Valvoline Maxlife 75,000 plus oil and other brands, thanks, dean  (just love the banna)
If you compare the product data sheets of Valvoline SynPower and Valvoline Maxlife Synthetic, there really isn’t much of a difference between the physical properties of the two oils. The Maxlife is a little thicker which is probably why the Maxlife does not have an ILSAC GF-4 Energy Conserving start burst license.
The Maxlife does have a bigger kick of Molybdenum at 300ppm vs. SynPowers 4ppm. Molybdenum is an anti-wear agent used in some motor oils.
Both oils utilize Group III base stocks meaning they are highly refined from crude oil.
Both oils have a Total Base Number of 8.3 so they should have no problem maintaining there detergency for 5,000-to-6,000-miles even though Valvoline does not promote nor warrant any of their motor oils to go past 3,000-miles/Three Months.
They claim there are a lot “special additives” in the Maxlife for older engines, but other than the added Molybdenum we don’t know the type and quantities.
I doubt you’d notice a difference if you compared both oils side by side with used oil analysis. I’d say, pick one you like and use it.
thanks for your imput and sharing facts with all of us, it has been interesting (do you like the banna?)
1973 Road Runner
1974 Satellite (for sale)
1973 240z (wifes)
1993 Ramcharger (thanks Devil)
2002 Honda S2000
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Re: Synthetic vs. conventional oil?
[Re: deansrr]
#605549
02/16/10 02:36 AM
02/16/10 02:36 AM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Well I just tore the pan, timing cover, valve cover, etc off of my 1990 Nissan Pickup. Had to change the timing chain which has been rattling for 150 plus thousand miles. The motor currently has 217xxx thousand miles on it. I would guess that the average oil change interval has been around 6-7K over its life so far, with some intervals close to 10k. Ive had this truck since I was 18, and for the first 165K or so miles it was driven HARD. Raced the snot out of it, pulled my bass boat, mudded the crap out of it, etc. I never ran any syn in it, only dino oil. I expected to find sludge in the pan and valve cover. There was NO sludge. None. Zero. Zilch. The pan was completely clean, except for parts of the plastic timing chain guide. If I showed you pics of the crankcase and valve area you would think the motor has very low miles. On my diesels, I change them 7k-8k unless Ive pulled the travel trailer quite a bit, then its 5k or so. If had syn in them, Id go 10k on them. My 93 Concorde had 201xxx on it when I sold it. Again, changed the oil 6k-7k on it. If you know anything about those engines you know they are murder to keep alive. My current 00 Concorde has 182xxx on it and again gets its oil changed about the same. Again, no syn in either, only dino. I have never bought into the 3k mile interval, and never will. Why should I???  Ive got better things to do with my 30 bucks.............. 
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Synthetic vs. conventional oil?
[Re: MoparforLife]
#605550
02/16/10 02:37 AM
02/16/10 02:37 AM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
Yeah and these new and improved oils can't even handle the punishment of a flat tappet cam like the older 'poor' quality oils could handle. Really an improvement 
Not the oils fault....your government at work. 
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Synthetic vs. conventional oil?
[Re: DCM71cuda]
#605555
02/16/10 04:19 PM
02/16/10 04:19 PM
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Joined: Jan 2003
Posts: 4,866
N. of 8mile, S. of heaven
Spike
Go Blue!!
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Go Blue!!
Joined: Jan 2003
Posts: 4,866
N. of 8mile, S. of heaven
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Quote:
Here is somebody that tried some REAL extended oil change intervals.
40K oil change.....
Later in the thread he states that it was "ummm...actually 60k....and the reason is not important.
That there is poor maintenance or no common sense or both.
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Re: Synthetic vs. conventional oil?
[Re: Spike]
#605556
02/16/10 09:55 PM
02/16/10 09:55 PM
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Joined: Jul 2003
Posts: 1,869
Carmichael, CA
NotEnufGarage
top fuel
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top fuel
Joined: Jul 2003
Posts: 1,869
Carmichael, CA
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I only run synthetic (Mobil 5W30) in my BMW. She goes about 7500 between changes. Everything else gets conventional 10W30 with a 3000 - 3500 or annual oil and filter change, regardless of miles. The Cummins truck gets an annual change, usually about 5,000 miles and filter, with 15W40 conventional.
I don't care about the extra expense of "premature" oil changes, since the oil ends up getting used again in the fuel tank of my Cummins, where I burn 10% waste motor oil. The older Cummins handle that with no problem, but I wouldn't do it on the newer ones because of the higher fuel system pressures, plus I have extra fuel filtration on my truck (10, 5 and 2 Micron fuel filters in series between the lift pump and the injection pump).
Some of the oil I drain is even still dark amber in color when I drain it, but I figure this is cheap insurance. I always stock up on motor oil and filters (Bosch or Purolator, never Fram) when Autozone, Napa and Kragen have sales.
'70 Charger FE5 Daytona Clone 451/727/D60
'70 Challenger FM3 440/833/3.55SG
'79 Ramcharger SE 360
'89 Shelby Dakota
‘06 PT Cruiser GT Convertible
‘07 Charger R/T Daytona
‘10 Ram 1500 ST Crew Cab
Yes, I'm a Dodge Boy. Verstehen?
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Re: Synthetic vs. conventional oil?
[Re: NotEnufGarage]
#605557
02/17/10 07:16 AM
02/17/10 07:16 AM
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Joined: Apr 2008
Posts: 1,285
Pacific NW USA
CompSyn
pro stock
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pro stock
Joined: Apr 2008
Posts: 1,285
Pacific NW USA
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Below, a couple pictures of an engine tear-down where the PROPER oil change recommendations were followed using extended life synthetic motor oil.  Cylinder Head/Rocker Arm Section  Oil Pick-Up These pictures are of a 1998 Ford F150 4.2 Liter V6 engine with 225,000-miles. Oil changes were performed at between 12,000-to-15,000-miles for the life of the engine. You can view the entire engine tear-down by clicking on THIS LINK
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Re: Synthetic vs. conventional oil?
[Re: CompSyn]
#605558
02/19/10 12:58 AM
02/19/10 12:58 AM
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Joined: Jan 2005
Posts: 12,422
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,422
Kalispell Mt.
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My 95 maxima motor was cleaner than that with 383,000 miles on it with generic brand oil changed every 3000 miles and it still ran perfect, leaked nothing and burned less than 1/2 quart between changes.
Someone better at math than me would have to figure out witch way is cheaper.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Synthetic vs. conventional oil?
[Re: HotRodDave]
#605559
02/19/10 09:30 AM
02/19/10 09:30 AM
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Joined: Apr 2008
Posts: 1,285
Pacific NW USA
CompSyn
pro stock
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pro stock
Joined: Apr 2008
Posts: 1,285
Pacific NW USA
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Quote:
My 95 maxima motor was cleaner than that with 383,000 miles on it with generic brand oil changed every 3000 miles and it still ran perfect, leaked nothing and burned less than 1/2 quart between changes.
Someone better at math than me would have to figure out witch way is cheaper.
Math isn’t my strong suite either but I’ll give it a try…
1995 NISSAN MAXIMA 3.0L 6-cyl Engine Code [C] VQ30DE
Listed crankcase capacity with oil filter: 4.3 quarts + 0.5 quarts of add oil between oil changes equals 5 quarts needed for each oil change.
383,000-miles divided by 3,000-miles equals 127.66 or rounded to 128 oil changes.
Let’s calculate this based on today’s pricing to not over complicate things.
AutoZone 5W-30 generic store brand motor oil: $2.79qt.
$2.79 per quart multiplied by 5 quarts equals $13.95 per oil change (just for oil).
128 oil changes multiplied by $13.95 equals $1,785.60 (just for oil)
Now let’s calculate this with the same car, the same mileage, with an extended life synthetic motor oil that costs nearly 2.5 times more per quart.
383,000-miles divided by 15,000-miles equals 25.53 or rounded to 26 oil changes.
Top brand extended life synthetic 5W-30 motor oil: $6.75qt
$6.75 per quart multiplied by 5 quarts equals $33.75 per oil change (again, just for oil).
26 oil changes multiplied by $33.75 equals $877.50 (again, just for oil).
So in this scenario we can see that even though an Extended Life Synthetic motor oil that costs nearly 2.5 times more per quart to purchase actually saves $908.10 over the given life span of this vehicle. Also consider we haven’t even considered the difference in purchasing 128 oil filters versus only 26.
Then consider the waste oil. 510 more quarts of motor oil had to be disposed of with the generic oil changes at 3,000-mile intervals versus the extended life synthetic at 15,000-mile changes. That's more than two 55-gallon drums of waste motor oil that could have otherwise been avoided.
Now, I’ve never liked story problems so I’ll leave this last part for someone else who enjoys doing them.
It takes Billy (X) minutes to drive to the auto parts store, gather supplies, change his motor oil and properly dispose of the waste oil.
(X) minutes multiplied by 128 equals how many minutes?
(X) minutes multiplied by 26 equals how many minutes?
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Re: Synthetic vs. conventional oil?
[Re: buildanother]
#605560
02/19/10 04:12 PM
02/19/10 04:12 PM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
Murder? To keep a 3.3 or 3.5 alive?
Both from what Ive gathered..........
All I know is that there are plenty of Concordes, Intrepids, Visions, etc from the early 90s to 00s around here with blown motors from oil related problems. A buddy has an auto repair business and he says he sees the same thing. 
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Synthetic vs. conventional oil?
[Re: Von]
#605561
02/19/10 04:15 PM
02/19/10 04:15 PM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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FWIW, Ive got to agree with the above. My Nissan was cleaner than that with 217xxx on it with the oil change intervals I listed above.  At the boneyard on Wednesday I looked at another Nissan 2.4 with 445xxx on it. It too was cleaner than the above pics. Not that it means much, as I have no idea about oil type used, change intervals, etc on that motor.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Synthetic vs. conventional oil?
[Re: chuck2112]
#605564
02/19/10 11:46 PM
02/19/10 11:46 PM
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Joined: Jan 2005
Posts: 12,422
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,422
Kalispell Mt.
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I wasn't adding the 1/2 quart, it just went from the top of the crosshatch to the bottom of the crosshatch and it would be a little more or a little less depending on driving style over the miles, one time we drove from Nashville to here and back without changin the oil and the leval barely moved, the oil looked brand new and that was about 4500 miles round trip and at that point the car had about 350,000 miles, in town it would use a little more but never enough to warrant adding oil, it would darken the oil in 3000 miles but not blacken it. The shop I was in would buy used oil to burn for heat when they ran out of used oil, both places I have worked here burn used oil for heat also. Generic oil is less than 2.79 a quart here and I don't have a clue what mobil one cost here.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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