PU SM or something else?

[HyundaiGuy]

I'm quickly coming up on the 16K service on my Fiat, and my wife's Fiat is due for its first oil change at 6 months (3500 miles.)

I have been using PU in my car but can only find the SM rating locally. Should I stick with it or am I better changing to something else that is rated SN?

 

[HTSS_TR]

"HyundaiGuy" and "HyundaiGal" but drive Fiat's !!!

Joking aside, if your Fiat's spec API SN the you should use SN to avoid possible warranty problem if a slight chance that you need some engine work while the cars are under warranty.

 

[kaminski54]

I'd use the SM with no hesitation. It actually had higher levels of some additives (Boron) than the SN. The primary advantage of the SN is it is GTL (gas-to-liquid) and has a ridiculously low NOACK. If you run uber-extended OCIs or have a VERY hot running engine, this may be a concern. With a Fiat, I don't think you have the engine temperature problem, but I admittedly have no experience with those engines. I am a huge fan of PU so I would use any flavor I could get my hands on... JMHO.

 

[Doog]

Originally Posted By: HTSS_TR

Joking aside, if your Fiat's spec API SN the you should use SN to avoid possible warranty problem if a slight chance that you need some engine work while the cars are under warranty.


Please tell us how a Fiat dealer will know the difference between the two oils if in the sump?

 

[chubbs1]

Run the SM without any hesitation. It is a great oil and sometimes I wish I could find the SM formula. When it came out it was stout! Not that the SN isn't great as well. USE THE SM!

 

[tommygunn]

Originally Posted By: Doog
Please tell us how a Fiat dealer will know the difference between the two oils if in the sump?
I'm sure if it came down to paying for a blown engine, the dealer could send in a UOA to see what the oil looks like and "draw a conclusion" as to what oil is/was being used, based on what happens to be "in" the oil at the time of the sample.....?

 

[pbm]

I wouldn't hesitate to use the SM rated PU.
I have used SM rated Mobil 1 in my Cruze turbo simply because I had it. I probably wouldn't BUY SM oil unless it was discounted.

OT: How does the SM version of PP compare with the SN...I ask because I have some to use up.