JohnJL

I've checked the search and much of the consensus (and my experience on other vehicles) is that 10w40 is the right cold-weather choice. OK, cold is relative. I'm talking about 10 degree to 40 degree operating temps. Street driving in this temp.

With this knowledge in mind, I went down to my local autozone, only to find Mobile doesn't make that grade. Yes, I am stuck on Mobile 1 for the time being.

The Mobile1.com site lists the following grades...which is the right choice for this temp range?

Before anyone gives me the "RTFM," I realize there is a page in the back of the manual, but I don't have it with me today and I want to pick it up on the way home...plus some of these weights weren't available when the manual was printed in 94.

This was an interesting thread (https://rennlist.com/forums/showthre...ghlight=mobile) , particularly because there is a statement midway down that "993's came from the factory with 5w-40." Mobile1's site doesn't list that as an available product (http://www.mobil1.com/products/trisynth/index.jsp)

Thanks all!

John

TheOtherEric

In the winter, I mix 15W-50 and 10W-30 in approximately equal amounts. Makes sense to me. However, I'd have to think that 0W-40 would be a better solution, but I don't have an Autozone nearby.

JohnJL

Gonna leave and play hookey soon...need a few more responses here...please!

smead42

Joel, Tech 993 PCA, says 0-40 Mobil I due to hydra. lifters needing oil that is not too thick.

Bob - 95 993/C2

If you are an advocate that starting the car puts the most wear on the motor, then you might want a lower viscosity duirng startup and first minutes of running.

Or are you one who starts the car, allows it to warm up and appreciates the higher viscosity that is now protecting the motor parts?

I'm in the second category with all my cars...and it sounds like 0-40 would be just perfect if I could find it.

GrantG

The Mobil 1 15W15 still flows rather well at 10F. I think the bottle says it will still pour at -48F

JohnJL

I think they all advertise that on the bottle.

I ended up putting in Mobile 1 0w40 and Mobile 1 transmission fluid. Shifting is very smooth even when very cold. No grinding as some have observed when cold.

Mike_A

.....i conducted my own test.....left a quart of 0-40 and 15-50 outside overnite in 12-15 F weather.....in the morning i timed each one as i poured them into an empty.......seeing is believing......i use 0-40 year round in the street cars......IMHO , 15-50 is for a track car

Bob - 95 993/C2

+++ So what were the results of the timing experiment? Does that mean that if it pours readily at those temps it will be as readily available for use at the critical points in the motor during startup? I thought the concern there was that it will have left the lifter due to its fluidity while car is parked? How about for those of us that live in operate in hot weather a good deal of the year? Questions.