I have been using 0-40 oil in my 07 VW Rabbit. I have over 150k miles and think that i should be using a heavier oil. Any suggestions?
I would use whatever the manufacture suggest. Most cars will have the suggested oil use on the oil cap under your car hood. The best thing you can do is change your oil on time and use what is suggested by the people that make the engine. As far as what brand of oil to use, my option is to use any oil that does not have "high mileage" or crazy Teflon additives. Most of these additives (like the Teflon particles) are not small enough to pass across the oil filter and never end up in the engine.
Something that I have been using in all my vehicles (including a 2001 GMC Jimmy with 180K) Is Marvel Mystery Oil. I use it in all my cars and anything with a motor. Its a Oil additive that is a detergent. It will help clean out any deposits or old oil in your engine. It can also be added to your fuel as well.
That's my 2 cents :)
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