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Brad Penn: 1600-1700 ppm

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Rotella T: 1200-1300 ppm

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Royal Purple: 800-900ppm

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Junky, you raise good points, but keep in mind...DELO oils were not engineered for our flat tapped gasoline V8s. Ive spoken directly with several Chevron engineers (I've purchased over a million gallons of DELO 15w40 over the years) who tell me the zinc in their oil is for the punishment that the small end of the rod endures during the uber high compression of a diesel. The detergent is there to keep soot in suspension.

Gasoline engines have different requirements. Yes, DELO oils ARE good, but for our use, I believe there are better answers.

BTW, did you know Chevron DELO is a synthetic blend (at least technically--thank you Castrol)? It just hasn't been marketed that way. It's about to though---DELO XLE ( as opposed to LE) is just about to hit the streets.

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APPLICATIONS

Delo 400 LE SAE 15W-40 is a mixed fleet motor oil
recommended for naturally aspirated and turbocharged
four-stroke diesel engines and four-stroke gasoline
engines in which the API CJ-4 service category and
SAE 15W-40 viscosity grade are recommended. It is
formulated for engines operating under severe service
and a wide range of climatic conditions.

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Delo 400 LE SAE 15W-40 is approved for: API Service Categories CJ-4, CI-4 PLUS, CI-4,
CH-4, SM, SL

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Joe Gibbs is another company that says the ultra-high detergent levels in Diesel oils harm the effectiveness of the ZDDP.

R.

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Junky, you raise good points, but keep in mind...DELO oils were not engineered for our flat tapped gasoline V8s. Ive spoken directly with several Chevron engineers (I've purchased over a million gallons of DELO 15w40 over the years) who tell me the zinc in their oil is for the punishment that the small end of the rod endures during the uber high compression of a diesel. The detergent is there to keep soot in suspension.

Gasoline engines have different requirements. Yes, DELO oils ARE good, but for our use, I believe there are better answers.

BTW, did you know Chevron DELO is a synthetic blend (at least technically--thank you Castrol)? It just hasn't been marketed that way. It's about to though---DELO XLE ( as opposed to LE) is just about to hit the streets.

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Here is what Petroleum Quality Institute of America (PQIA) recently reported for: Chevron Delo® 400LE SAE 15W-40, API CJ-4/CI-4 Plus/SM.

Phosphorus 1312ppm
Zinc 1490ppm

For more, click on this link - HERE

What Chevron engineers? Who did you talk to?

This is what Chevron says right in their Product Data Sheet:

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APPLICATIONS

Delo 400 LE SAE 15W-40 is a mixed fleet motor oil
recommended for naturally aspirated and turbocharged
four-stroke diesel engines and four-stroke gasoline
engines in which the API CJ-4 service category and
SAE 15W-40 viscosity grade are recommended. It is
formulated for engines operating under severe service
and a wide range of climatic conditions.

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Delo 400 LE SAE 15W-40 is approved for: API Service Categories CJ-4, CI-4 PLUS, CI-4,
CH-4, SM, SL

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Seriously folks, Chevron Delo 400 LE is enginered for "mixed fleet" diesel and gasoline applications, see also API (SM) and (SL). Let's let the diesel detergent myths stop here. It's a Heavy Duty Engine Oil (HDEO) for heavy duty applications.

For more, Chevron DELO 400 LE SAE 15W-40 Product Data Sheet at this link - HERE

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Comp: you DO know that DELO stands for "diesel engine lubricating oil" right?
Well now you do. I said they ARE good oils, just very high in detergent for our applications. There are better choices.....ummmm I think you of all would agree with that.

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Comp: you DO know that DELO stands for "diesel engine lubricating oil" right?
Well now you do. I said they ARE good oils, just very high in detergent for our applications. There are better choices.....ummmm I think you of all would agree with that.

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And now YOU know Chevron actually recommends DELO for API (SM) and (SL) rated gasoline engines. So now you can stop spreading the tripe that it's not well suited for gasoline engines when it's engineered to work equally as well in both diesel and gasoline applications.

Old design carbureted V8s aren't the cleanest running engines as where more robust detergents can actually be a plus. But you're right, DELO is not my first choice in engine oil.

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[quotes. So now you can stop spreading the tripe that it's not well suited for gasoline engines when it's engineered to work equally as well in both diesel and gasoline applications.
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That is flat out wrong. DELO was NOT "engineered to work equally as we'll in both diesel and gasoline applications" it was engineered for diesel applications period. As stated, I've purchased over a million gallons over the last 12 years. PM me for more info. Chevron realized a lucrative secondary market after its introduction and the marketers took over. "Tripe". Give me a freekin break!

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I bought the 10 pack of the ZDDPLUS off Ebay and I found this:

http://www.zddplus.com/imgs/ZDDPlusTestResults2.pdf

I'll use that and keep using Rotella.

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Looks like the "test report" has been "embellished" a little. Chemist would not take it upon himself to comment upon "...optimum range for high-performance flat tappet engines..." Whole thing strikes me as ad hype...

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I bought the 10 pack of the ZDDPLUS off Ebay and I found this:

http://www.zddplus.com/imgs/ZDDPlusTestResults2.pdf

I'll use that and keep using Rotella.

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Joe Gibbs is another company that says the ultra-high detergent levels in Diesel oils harm the effectiveness of the ZDDP.

R.

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i was told this by a guy at NAPA when I bought JOE GIBBS ,my first choice was VR-1 racing oil but he talkled me out of it after i asked if i could ad zinc

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I'm "assuming" Joe Gibb would rather have you buy his oil and I'll bet the guy at NAPA is related to GG,if he said it,it has to be correct !!

I'll stick to my Brad Penn!

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Brad Penn: 1600-1700 ppm

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Brad Penn utilizes the ASTM qualified lab, Southwest Research Institute (SwRI), for additive element testing and reporting. There again, SwRI uses the industry standardized test method, ASTM D5185 (ICP), to determine zinc content of lubricant oils.

As such, Penn Grade 1 oils have between 1540-to-1565 ppm zinc content.

For more, click on Brad Penn’s link - HERE

For more on Southwest Research Institute (SwRI), click on the link - HERE

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SWRI does good research and is a reputable institute, but ICP-AES simply isn't as accurate as NAA (it's only the "industry standard" because NAA typically requires access to a nuclear reactor). You will literally not find a single paper in a peer-reviewed scientific journal that claims that ICP-AES is a more sensitive method of trace element analysis than NAA.

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Brad Penn: 1600-1700 ppm

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Brad Penn utilizes the ASTM qualified lab, Southwest Research Institute (SwRI), for additive element testing and reporting. There again, SwRI uses the industry standardized test method, ASTM D5185 (ICP), to determine zinc content of lubricant oils.





As such, Penn Grade 1 oils have between 1540-to-1565 ppm zinc content.

For more, click on Brad Penn’s link - HERE

For more on Southwest Research Institute (SwRI), click on the link - HERE

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SWRI does good research and is a reputable institute, but ICP-AES simply isn't as accurate as NAA (it's only the "industry standard" because NAA typically requires access to a nuclear reactor). You will literally not find a single paper in a peer-reviewed scientific journal that claims that ICP-AES is a more sensitive method of trace element analysis than NAA.

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