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I off-road on very dusty roads some in my ‘13 Chevy Silverado 4x4 (stock) and would like to know what the recommended oil change frequency is. Miles on engine = 70K.

In 5 months (late Sept-Oct) I’ll be taking my 10,000 miles on the clock 2024 Subaru Outback Turbo on a 3,000 mile road trip thru the Southwest (CA, NV, NM,UT). The oil the dealer puts in is the stock Subaru 0-20 oil and id like to know if that oil is up to the demands that will be put on the...

About 7K miles ago, I rebuilt the engine on my '89 Corvette. It used a quart of dyno oil every 450-500 miles (compression is fine on all cylinders) when using 10-30 or 10-40 oil. I'm now using Valvoline Racing 20-50, have 250 mi. w/little oil used (less than a 1/2 pint). Would I be ok to go to...

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SO, what is the best crankcase cleaner...diesel oil, commercial cleaners sold for the purpose, ATF or what???

The other day I asked Valvoline about using oil that is intended for use in diesel engines and here are their responses (including the follow-up Q/A): A - "Most Valvoline diesel oils are also rated for gasoline applications, but we are not sure why you would want to use diesel oils, as these...

Are there any rules/customs on this forum that would prevent me from quoting here a major oil manufacturer's response to a question I asked them about if using diesel oil in my gas engine cars was ok?

I just found out that I can get a case of Castrol blend 5-30 or 10-30 for $1.70 per quart. Should I get a case or two?

Hello, I've known about, and lurked on, this site since '04 when I joined the Corvette Forum. Your site is terrific! What is the best way to find what the best oils are for my: '99 Ford Taurus DOHC w/120,000 mi.? '04 Buick Rainier SUV 2/70,000 mi.? I especially wonder about the Castrol...