What weight of Mobil 1 do you guys use?

[87ttopstang]

Trying to decide on the weight of oil to use this summer. What are you guys running?

 

[At1Maverick69]

I personally use 5w30 cuz a TSB stated that that's the right thing to use

 

[89MustangGX]

5w30 for me.

 

[THC420]

I use 10W30

 

[RacEoHolic330]

I use full synthetic 15w-50. My engine likes the thicker stuff with the supercharger.

 

[HISSIN50]

gonna need a lot more info to make an informed decision, IMHO. basically one wants to run the thinnest oil that maintains decent pressure at all times and does not all leak or burn off.

what do you run now and how does it do? what ambient temps is the car driven in? miles on the motor?

you are not gonna go too far wrong - M1's synthetics flow down to about 50*F below freezing. But you can probably tailor the decision a little.

good luck.

 

[squeeeg]

I use 15-50 because that is what the guy before me used. I am thinking about going to 10-30 or 10-40 for my next change.

 

[MarSaleenMustan]

i dont use mobil, but i do use 10w-40 for my 170k mile 5.0, but i will be switching to a 5w-20-5w30 with the fresh motor i'll be putting in within the next few months.

 

[Sicarius428]

10w-30 for me. Reminds me I gotta pick up a few more quarts at costco...
Kevin

 

[FastDriver]

Car was smoking with 10/30 so I decided to try the thicker 15/50 and see if it stopped. It seems to have worked.

Don't know for sure if it's better, worse, or negligible for the turbos, but I haven't noticed any problems whatsoever.

Chris

 

[tmoss]

5w-20

 

[stang22]

5w-20

Same here.

 

[bobbys9350]

Same here.

you guys must have some fairly tight bearing clearences.

 

[tmoss]

I doubt it, my engine may have (bought the car used so I don't know the histiry for sure) 195,000 miles on it. When I put the new heads on it, the cross hatching lloked good and crank pressure was ~145psi average. Oil pressure hot is ~25# at idle and ~50# at speed. It doe snot use much oil at all.