Re: synthetic oil
[Re: generallee6901]
#681036
04/26/10 07:55 PM
04/26/10 07:55 PM
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Joined: Jan 2003
Posts: 5,894
Florida
Locomotion
master
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master
Joined: Jan 2003
Posts: 5,894
Florida
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Amsoil has a variety of high zinc oils and synthetics have other benefits over conventional oils also. One obvious example was when I switched form conventional Rotella 15w-40 to Amsoil synthetic diesel 15w-40. There was an obvious temperature drop and a slight increase in fuel mileage. I travel the same routes often so the comparison was easy. My race car engine, trans and differential people have all had positive comments on what they have seen in my stuff. Not all synthetics are created equal either. But find out what you can and make your own educated decision. Most oils have gone down in zinc content over the years, even diesel oils. So one has to find recent info. Amsoil synthetic high zinc oils Amsoil source & additional info.
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Re: synthetic oil
[Re: fury4speed]
#681037
04/26/10 08:00 PM
04/26/10 08:00 PM
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Joined: Apr 2010
Posts: 27
West Coast, Canada
Dakota542
member
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member
Joined: Apr 2010
Posts: 27
West Coast, Canada
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Personally I use synthetic oil in most everything, and never had a problem. Mixed it with convertional, different oil filters, different companies, roller cam, flat tappet, OHC, whatever. The only problem I ever had was on an old 2.8L Chevy, changed back to conventional for one oil change and spun a bearing after about 600 miles. Coincidence? They say not to use synthetic on new engines, until they are broke-in properly.
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Re: synthetic oil
[Re: Pacnorthcuda]
#681038
04/26/10 08:04 PM
04/26/10 08:04 PM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
"specialty" synthetic brands like Amsoil and Redline have good Zinc/Ph levels. Mobil 1 probably is Ok although I haven't seen a recent lab report.
More 'generic' labels like Pennzoil or Quaker state I don't know.
STP red was tested and came up with 4000 ppm. ZDDPlus has 57,000ppm. Do the math for your crankcase capacity and see if STP makes you comfortable. It raises it some but not a lot. (I think the red bottle is 15 ounces)
Chevron Delo and Rotella diesel oils are so far testing OK (about 1200-1300ppm) be they could be reformulated downward at any time with no notice.
I used to use Mobil 1 for years in my 360 with no problems, then a wiped out a cam lobe and this was after they reduced the levels of additives in the oil. Anyhow - if you use Mobil 1 you will have to add the additives to it.
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Re: synthetic oil
[Re: generallee6901]
#681040
04/26/10 11:06 PM
04/26/10 11:06 PM
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Joined: Feb 2010
Posts: 1,645
Phila. Pa.
Mattax
top fuel
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top fuel
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
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Quote:
Does synthetic oil have enough zinc to run with out a additive or would i be better off buying the oil that has the higher amounts already in it.Right now i am using rotella t with stp additive.
Whether an oil is 'synthetic' or not has only a little bearing on the additive package. There are several classes of 'base stocks', often described as Group I, II, III, IV. All of them will have additives when formulated for gas or diesal engine uses.
How much ZDDP an oil needs depends on (a) whether the manufacturer is relying on that or using a different approach (b) the intended end us of the oil. If you're running a high lift - flat tappet cam then you gotta look for oils intended for this purpose rather than aimed at the latest generation of production vehicles. Surfing the net, my conclusion has been that oils intended to meet european requirements for turbo diesels are probably a good choice. Also those aimed toward high performance or heavy duty applications like Brad Penn, Valvoline VR1, etc.
If you want to hunt for more commonly available oils, download the pdf from the following link to school yourself. oil for corvairs and other cars Good explanation of the different base stocks, and much much more.
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