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Synthetic to Conventional


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csloftis
New User

Oct 21, 2011, 5:23 PM

Post #1 of 4 (1232 views)
Synthetic to Conventional Sign In

I have a 2002 Oldsmobile Intrigue with 120,000 miles. While I was on vacation, my boyfriend had the oil changed and put conventional in it. Today, we noticed a piece of paper taped under the hood saying it's only had synthetic. A friend of mine is telling me that going from synthetic to conventional will cause my engine to blow. Everything else I've seen online says switching won't be an issue. Can I get an opinion on this?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 21, 2011, 5:27 PM

Post #2 of 4 (1225 views)
Re: Synthetic to Conventional Sign In

It's preferred not to keep switching but there won't be a problem to switch it back.



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Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 21, 2011, 5:49 PM

Post #3 of 4 (1205 views)
Re: Synthetic to Conventional Sign In

I agree. As long as you use the same recommend viscosity oil, you shouldn't have any problems.





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Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Oct 23, 2011, 8:07 AM

Post #4 of 4 (1167 views)
Re: Synthetic to Conventional Sign In

  1. Ditto - they are said to be compatible back and forth. I like synthetic oils but IMO either are fine on time,

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