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Bigboi924
Guest
Im going to change the engine oil for my dad's car, which oil should I use, 5W-30 or 10W-30? He told me he has been using the 10W-30, which has been working fine for awhile with no car problems. The 5W-30 is recommended by the lexus owners manual. Amazingly this car has 230,XXX miles without a single problem. So pretty much I just want to see anyones expert opinion.