Originally Posted By: Red91
You would be leary of a shop that uses an API SN SAE 30 oil in classic cars, beaters, and work vehicles that get run dry between oil changes?
I have multigrades available in semi and full synthetic for newer stuff.
Alabama gets significantly colder than where I live in the winter (seriously). SAE30 is fine for summer. What if they dont drive much, and end up with that oil in the winter? Yes it has its applications, but they are few and far between. Like mowers, antique (parade) cars, etc. Beater work truck? 15W40 would be a better choice. Beater car? 10W30 or 10W40 would be a better choice. I LOVE me some beaters, and have owned plenty of them in my lifetime. In fact, at 34 years old, I have owned over 30 cars, many of them ultra beaters that cost $100. I would be EXTREMELY disappointed in a shop and calling it unprofessional if they installed SAE30 in any car I have ever driven. And this is coming from a guy that had his own small engine shop and did hundreds of oil changes per year. A professional shop uses what the auto manufacturer calls for, unless the customer requests otherwise. Yes, even in beaters. Classic cars are another thing.