quote:I only recommended 10w30 because I thought I remembered you saying in a previous thread that your car was very high mileage and used oil. In a conventional oil, it should use less 10w30 than 5w30.
Originally posted by mkosem: hmm, I see you recommend drive clean 10w30. saturn recommends 5w30 in freezing weather. Since that is a dino oil wouldn't a 5w30 be better for the short drain interval I plan to run?
quote:Nothing comes to mind. Most conventional 5w30 oils are actually made with a higher VI base oil (Group II+) than the 10w30s, so from that standpoint, they are a "better" oil. I've read elswhere on this forum that Mobil Drive Clean oil is Group I based. I believe this is totally erroneous, especially for the 5w20 and 5w30 grades. It's virtually impossible to meet GF-3 standards in those grades with all Group I base oil.
Originally posted by mkosem: right, but I'm just using the dino for a very short time to follow up the auto-rx. Is there any reason other than consumption that would make a 10w30 better for me?