Syntec oil option for '05 Buick Park Avenue SC

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Hello to all!

I was just wondering what is the best weight of oil to use with in my supercharged 3.8L motor. It has 70K on the clock. It calls for 5-30W. I recently got the castrol / K&N deal at advance auto.All they had was 5-40W oil. They said that I could exchange it when the 5-30W oil comes in. Is it ok to use it for this time of year in PA?

Thanks and have a nice day....Kevin
 
Originally Posted By: addyguy
The 5W-40 will work just fine in that engine, especially for the summer. I'd use it.


+1
 
It will be fine, but those 3.8's have excellent oil pressure on 30 weight oil. I'd use the Syntec 0W-30, myself. It is the best Syntec, imo.
 
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