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I been reading a lot of the praises people have for the GC. I have a newer model toyota that calls for 5w-30 and have been doing 5-6k mobil 1 changes for. It is used in sunny and hot California so I was wondering is it best to stick with 5w and would 0w cause any problems since it isnt all...

Im curious does anyone have statistics with car manufactuers and sludge issues? I know some european makes such as BMW will swear up and down that an oil change and other maintenance is not needed for 10-15k miles but they dont emphasize type of oil. Leading the layman to possibly think that...

I noticed while looking through the oil change log of my grandads V8 420SEL which now has over 220K miles that the last few oil changes have used 20W-50 whereas up until about 190K it was always using 15w-40. I asked him why, but he doesnt really know he just knows he takes it to his guy and...

I have been doing a lot of reading regarding AutoRX lately on their site as well as this BITOG site. While many here say its good to use it on higher mileage cars or leaks or some sludge. The AutoRX site recommends it for newer cars as well, saying it can clean out metal deposits and other dirt...

So I see some cars burn oil while others burn very little. It has always been in the back of my mind, does burnt oil just blow out the exhaust or is it actually cooking and leaving that caked on sludge behind? Because not to long ago I saw some pictures on the internet of sludged up engines...

I have been reading posts for a little while now. And I have picked up some good info. Considering different synthetics REdline, M1, Amsoil all have different properties would switching brands often cause premature leaks or other long term problems? Im reading on some posts where one oil will...