We all have our own bias as to which oil is best,
but what are the facts, outside of our Personal Beliefs

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Feb 15, 2025 #history #crudeoil #motoroil

Did you know synthetic oil was created for airplanes and NOT automobiles?

However, the 4 advantages of synthetic oil compared to regular mineral based oil make synthetic oil perfect for modern turbocharged engines.

Continuing our HISTORY of MOTOR OIL series we visit Dr. Ken Hope and the gang at Chevron Phillips Chemical to learn how synthetic base oil is made and reveal the 4 properties that make synthetic oil superior to conventional oil.
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I'm in the process of researching synthetics for my new 3.0l Duramax. GM has it spec'd for a 0w-20 DexosD oil.

Cruising around on Bob Is The Oil Guy, the consensus is that the vast majority of 0w-20's aren't up to the task according to posted UOA's. HPL has blended a 5w-20 that is a DexosD oil, but not on the "approved" GM list. And Amsoil's 5w-30 Diesel oil isn't on the list either.

I will keep researching and figure it out.

 

I’d heard it was a WWII invention by the Russians or Germans to keep the engines in their tanks and other rigs from freezing up on the eastern front in subzero temps

 

and those 2,000 hp Royals Royce Merlin aircraft engines, at 30,000 feet, don't like cold, frigid oil... or on the ground at -10*F trying to get one started up.

that is why there were a lot of Diesel fired Hot Air blowers for the engines in cold climates.

 

this one is, not on the list, but it is good stuff,
I have it in my 7.3L
I have a Blackstone report on it at about 3800 miles? IIRC

 

If it's not on the list, don't even think about using it. Auto manufacturers (technically just "parts installers" anymore since nobody actually manufactures their own brand-specific parts anymore) will come up with ANY excuse to deny a warranty claim and oil changes top the list when it comes to new engines.

If I were to lose my mind and buy a new vehicle with a warranty, I wouldn't entertain the thought of doing my own oil changes; when that rear-engine timing chain ****s the bed at 25K or the wet oil pump drive belt degrades within the first 50K miles, I want GM using that warranty money I've been paying back to the bank for half a decade to replace the engine......and not deal with any grief over $$$$$.


If someone's not following me on the warranty money part, I mean that the cost of the vehicle isn't JUST what the vehicle costs....the huge payment covers the brand's expenses when it comes time to do repairs that fall within the time and mileage limits of their warranty. They're not losing money on warranty repair work.

Don't gamble - get receipts.

 

I'm really skeptical of the water thin oils used in new engines. Esp in high compression engines. I think they're trading longevity off for emissions/fuel economy.