I don't think ANYONE would recommend switching back and forth. What purpose does that serve? Seems pointless and I have never ever heard this recommended by any mechanic.marc780 said:If the engine doesn't leak oil now, it probably won't with synthetic either. If the engine had a leak now synthetic might make it worse, but why would you use expensive Mobil 1 on a leaky engine.
I've switched from dino to synthetic and back again on many of the cars and trucks i have owned (10 in all) and i have never noticed any ill effects from doing that. Sometimes i even add 1 qt of mobil 1 to 4 qts of dino at oil change time and again, there's no effect. Except the engine seems to run a little smoother.
4qts?? I use 4qts in my 4cyl... shouldn't you be using around 5qts??RAV4EVR said:I use BLEND. I put in 3 quarts of conventional 5W30 and one quart of 10W30 synthetic in my V6 Camry. Currently has 103k miles. Started doing it at 92k... Did not have leaks then. Don't have leaks now but my engine is clean from inside... :thumbup: and also at start ups I have less wear and tear... :thumbup:
Sometimes i would put in synthetic if i were driving to Vegas in August or to Grand Canyon in the spring, it just makes me feel better. Of course i'd run synthetic all the time if i were a rich man. But i can't stand to let the oil go more than 3 or 4000 miles without changing no matter how good i know the oil is.I don't think ANYONE would recommend switching back and forth. What purpose does that serve?