Mobil 1 0W-40?

[p3230]

From the Porsche Dealership in Toronto Downtown Porsche Mobil 1 0W 40.

[78F350]

I'm pretty sure that this decal was paid for by Mobil at a cost of many times the price of the decal:



My 2001 owner's manual does not have ANY recommendation of a 0 weight oil:



0 weight Mobil1 oil? I put in in one of mine because it was on sale. Next 6 month change I think it's going to 10W-40 Castrol Edge, if the engine hasn't had a catastrophic failure by then. :dance:

[newBgeek]

Originally Posted by 78F350

0 weight Mobil1 oil? I put in in one of mine because it was on sale. Next 6 month change I think it's going to 10W-40 Castrol Edge, if the engine hasn't had a catastrophic failure by then. :dance:

A very common misconception is that the "W" stands for weight. That's not true. It stands for "Winter" and just means that the first number is the viscosity rating at 0 celsius. The second number is the viscosity rating at 100 degrees celsius (212 fahrenheit) which is generally operating temperature. So it's the second number that you're really concerned about. The biggest advantage of a low Winter number is quicker flow at startup.

A great read for oil basics is Bobistheoilguy.com's Motor Oil University blog. Motor Oil 101 - Bob is the Oil Guy - Bob is the Oil Guy

[Ciao]

Originally Posted by 78F350

I'm pretty sure that this decal was paid for by Mobil at a cost of many times the price of the decal:



My 2001 owner's manual does not have ANY recommendation of a 0 weight oil:



0 weight Mobil1 oil? I put in in one of mine because it was on sale. Next 6 month change I think it's going to 10W-40 Castrol Edge, if the engine hasn't had a catastrophic failure by then. :dance:

Why is 0-40W used by many dealers, mechanics, and individuals? I plan on using Liqui Moly 5-40W

[kk2002s]

Ok Here we go
I have been using M1 0-40 since I bought 4 years ago. I had a 3 year power train warranty and only wanted to use recommended while under.
Changed every 6 months = 3 - 5k miles.
Car never leaked.
This spring I did my change, drove a couple hour drives over a couple weeks (Not using car much these days).
Low and behold a small 1-1/2 inch stain on my garage floor each time.
Get under the car and "MOIST" between engine and bell housing with a drip hanging off that notorious area. Cleaned it up well for observation
Took it on a 700 mile road trip and a few more drives and now it's dry again. At least no more drips.
I'm thinking RMS and that new 0-40 is so thin it leaks. Then drive a 1000 miles, the oil thickens up
I think it's time to ween off M1

[Wangta]

Has anyone else used Amsoil 5W-40 in their Boxster?

[Oldcarguy]

Originally Posted by Ciao

Why is 0-40W used by many dealers, mechanics, and individuals? I plan on using Liqui Moly 5-40W

Porsche changed their recommendation to 0w-40 after the owners manuals were printed. I don’t have the links but I came across this while doing research to decide which oil I was going to use just after I bought the 986 (I chose to use Castrol Edge ‘European’ Formula). The Castrol is on the latest Porsche ‘approved for use’ list I found.