Which motor oil does better in GM Engines?
1. Mobil 1 ?
2. Castrol Syntec (American Made) ?
1. Mobil 1 ?
2. Castrol Syntec (American Made) ?
Mobil 1 or Castrol Syntec (American) better in GM Engines?
- Thread starter Rob Taggs
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Which GM engines as GM installs engines made in Japan, Korea, and ?????
Eddie,
3.4 liter V-6 and 3.8 liter V-6.
3.4 liter V-6 and 3.8 liter V-6.
I don't know if one was actually "better" than the other, but in my Grand Am with the 3400, M1 5w-30 made my engine noisy...cold start was horrible. But GC made it wayyyy quieter, almost silent at startup, but I'm not sure if regular syntec would do the same....hmmm
I have used both with no problems. I am using Syntec 5w20 now and will most likely stick with it. The UOA I have seen look pretty darn good.
I favor Mobil1, as it's a true PAO synthetic, not a Group III oil like Syntec. M1 5w30 should do well in either V6.
Around here, K-Mart has sales on Castrol Syntec pretty often. The price is usually $3.99/qt. For that price, I like Syntec. But if both oils were the same price on the shelf, I would definitely choose M1.
To answer the original question, both of these oils will work fine in a GM engine.
To answer the original question, both of these oils will work fine in a GM engine.
"...The price is usually $3.99/qt. For that price, I like Syntec. But if both oils were the same price on the shelf, I would definitely choose M1." Walmart sells M1 at $19.95 for a 5 qt. jug. That makes it a wash and M1 gets the nod for being a true PAO synthetic.
Id say M1 but thats just a guess as its PAO not GrpIII
Good point.
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