The funny thing is that if one wants to protect their catalytic converters as much as possible the only solution is to use diesel oil specifically Chevron delo ADF because it has no zinc or phosphorus. it gets its protection from molybdenum. Walmart sells ADF 15W-40 at a good price.
2010 ScionXD 188k mi; Valvoline 15w-40 15k mi
- Thread starter Stumpy
- Start date
People forget that diesels have catalysts now, too. Every CJ-4 and later API spec has been <1% SAPS specifically to keep the aftertreatment alive. Mostly it was DPF faceplugging with metallic additives (i.e. calcium) but many diesel systems do not have DPFs are are SCR only, so they oils still have to be safe for the iron or copper zeolite SCR catalysts.
Wow, such anger? I’ve generally really liked your posts. I didn’t mean to insult you. It’s really all about different formulations. The Scion is an old port injection engine. You Probably could run anything in it. You’d be taking a chance running diesel oil with unneeded extra calcium in a newer DI engine. LSPI and all. Why take the chance? Again I’m sorry if I offended you. Here is a good YouTube that is very instructive on the differences of diesel and gasoline formulated oils. He says it better than I did. And it does appear that the reason not to use a diesel oil in a ICE engine relates more to the excess detergent than the slightly higher levels of Zinc additives. So you’re right on that. Thanks for pointing it out.
My two direct injected Mazda's require SN not SN+ or SP rated oils. SP was designed to reduce LSPI some HDEO's are SP rated. I'm about to buy 4 gallons of Delvac1300 Super 10w-30 and have no qualms using it in my DI Mazda's because it is SP rated.
On the one hand we have a video on the general reason diesel oils aren’t as good as gasoline oils for gasoline engines. Because obviously they aren’t formulated for different applications.
On the other hand, we have laboratory-sourced evidence that a gasoline rated oil in a gasoline engine is giving superior wear performance. The oil just happens to also have a current diesel rating as well. Which is more persuasive? Specific evidence? Or a misinterpretation of generalizations?
The video really does a disservice by failing to distinguish between dual-rated oils and diesel-only rated oils.
Interesting take!