Hi the title pretty much said it all, what is the difference between the two oil. Since delo 400 is prefer in turbo and supercharger, does that mean its a better oil comparing to the regular chevron supreme? Thanks
difference between chevron supreme and delo 400?
- Thread starter jyguy915
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FWIW: I think it has something to do with the add pack - the delo having higher detergency to help keep things clean, and dispersency to keep higher levels of "stuff" in suspension over the OCI, as it would have to handle soot loading, etc. in a diesel. Turbos on a hard working engine present a seemingly high thermal stress zone.
PCMO vs. HDEO, am I right?
PCMO vs. HDEO, am I right?
Each of those oils may be better than the other depending on application. What engine and driving habits do you have ?
Many people mix the two oils - you can see many UOAs of mixes in the UOA section. Personally I have not been able to see any real difference in the results between pure Chevron, pure Delo, or a mix. Either way you get an excellent oil, though theoretically with the Delo you get a much stronger additive pack. On the other hand the Chev can be had dirt cheap on sale.
One issue is that the 15w40 Delo is too heavy for most passenger cars, especially in winter, and the 10w30 is hard to find. That is one reason many people mix. 50/50 Delo 15w40/Chev 5w30 should give a viscosity you can use year-round in many cars, and summer in most, and an excellent oil with a usefully boosted add pack.
One issue is that the 15w40 Delo is too heavy for most passenger cars, especially in winter, and the 10w30 is hard to find. That is one reason many people mix. 50/50 Delo 15w40/Chev 5w30 should give a viscosity you can use year-round in many cars, and summer in most, and an excellent oil with a usefully boosted add pack.
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On a few occasions, I have mixed Delo 400 15w40 evenly with Havoline 5W-20. It's fine for Michigan weather all year-round.
Delo is formulated for heavy duty diesel engines, Chevron supreme is formulated for high reving -multi- valve ohc gas engines. All ILSAC GF-4 lubricants will protect gas turbo engines, now lots of people on this site will tell you that only a synthetic will protect a turbo engine, this is not true CHEVRON-HAVOLINE will give excellent protection to turbo and supercharged gas engines.
I mix 'em!
I even mix in a qt of Havoline Synthetic 5w30 with 2 parts Delo 15w40 & 2 parts Supreme 10w40 in my W201.
The Supreme 5w30 and Delo 15w40 have the ISOSYN label on it. The Supreme 10w30 and 10w40 don't.
I think it all comes down to spec. The PCMO 10w40 spec is much relaxed than the others, so they don't need to make as good an oil as the others. Otherwise, I would think they would use a basestock at least as good as the 15w40 since 10w40 has a wider range.
I think it all comes down to spec. The PCMO 10w40 spec is much relaxed than the others, so they don't need to make as good an oil as the others. Otherwise, I would think they would use a basestock at least as good as the 15w40 since 10w40 has a wider range.
Umm, no. My Chevron Supreme 10w-40 has the ISO-SYN label. To theorize about one grade being better then another is just a retorical exercise. Which grade is appropriate in a given application is what makes one "better" in the Real World. I don't think the 5w30 would fare well in a heavy-duty diesel, nor might it do as well in old V8 or my Euro cars that get 10w-40.
Audi Junkie, I agree that correct viscosity is the most important criteria.
Whether the Supreme 10w40 is ISOSYN, I have seen my own observations and there are recent discussions on this in this forum too. My "reasoning" leads me to believe that both Delo 15w40 and Supreme 5w30 have better base stock than 10w40 currently. But that's just my personal opinion.
Whether the Supreme 10w40 is ISOSYN, I have seen my own observations and there are recent discussions on this in this forum too. My "reasoning" leads me to believe that both Delo 15w40 and Supreme 5w30 have better base stock than 10w40 currently. But that's just my personal opinion.
I'm not sure one oil can be "better" while sitting taking up space in the bottle, so the point is moot.
My 3rd qtr '04 batches of Supreme 10w40s(used 2 cases) had the IsoSyn labeling. When the recent SM batches started to show up early this year, only the remaining 5w30s SM and 15w40 Delo SLs still sport the IsoSyn labeling.
In fact, even Supreme 20w50 had this Grp II+ base oil. Last week, I spotted one remaining 01/05 IsoSyn case(even opened & inspected the bottles)that I hid under stacks of recently bottled 10/05 Supreme cases. I could score this remnant IsoSyn 20w50 when a CSK coupon comes up soon for summer or...for posterity.
In fact, even Supreme 20w50 had this Grp II+ base oil. Last week, I spotted one remaining 01/05 IsoSyn case(even opened & inspected the bottles)that I hid under stacks of recently bottled 10/05 Supreme cases. I could score this remnant IsoSyn 20w50 when a CSK coupon comes up soon for summer or...for posterity.
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