If I switch to syn, can I go back?

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Me too. I am using M1 0w20 syn for the coldet winter months and then back to dino 5w20 Castrol for the rest of the year. Even Mobil says this is ok.
 

wrm

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Thinks guys. I've been worried that I would not be able to change back because I read on another site that you can't. I guess I'll put it in today or tomarrow and see how it goes. Last 200 or so miles I've been cleaning it out with Seafoam and got good results.
 

wrm

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I'm a newbi and have a question about Mobil 1. I was thinking of switching to it and would like to know if in the case I didn't like it if I could switch to a mixed oil. Or should I try a mix or blend I think it's called. My chevy has 117,000 miles and no leeks, good and clean internals.
 
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You bet you can. I've switched between dino and synth, summer and winter, in several vehicles with no ill effects.
 
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quote:
Originally posted by eljefino: You bet you can. I've switched between dino and synth, summer and winter, in several vehicles with no ill effects.
Since I have found this site, that is what I have decided to do. I'm currently running M1 5-30 SS in the '01 85K Grand Caravan 3.8L and want to run Chevron 10-30 once spring hits.
 
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