gboy

Hi Guys

I just had an oil change done and realised that the shop put in Mobil 1 10w30 oil. Is this serious? My car has 99 000 miles on it.

Thanks

Gary

Flying Finn

Go back to the shop and have them put proper (20W-50 Mobil 1) oil in it.

I wouldn't drive with 0-30 oil for too long.

Father of 3

errr, 15w-50.

Olav A.

15w-50

Flying Finn

...yes...

I don't think Mobil has made 20W-50 for a while (I probably had my old 911's Gastrol 20w-50 in my mind)...

amfp

0-40 is also acceptable to use. I would also have it changed. Try to have them changed the filters too, however the different grades do mix.

Bull

If you really drive the car as it should be driven, you will burn through a lot more oil than whatever is normal for your car. As stated, go back and require them to change the oil. I wouldn't worry about the filters if it was a recent change.

Edward

Hi Gary,

If your "Newport Beach" is our SoCal Newport Beach, I'd definitely have the shop drain and refill with Mobil 15w/50. You don't need me to tell you that it gets hot here, especially if you get caught in traffic. I wouldn't sweat the filter, though. Assuming they had replaced it with an OEM Porsche filter (or a Mahle which is OE), you're good.

Edward

Bijan

My Porsche dealer has switched to 0-w40 Mobil1 for the 993's. I think it is convenience to use the 996 grade. Ever since, I have had small oil leaks, lower rocker covers and timing chain covers and consumption is about 10% more. Otherwise car runs fine.

dhicks

Lower viscosity so it will find all those small leaks!

Flying Finn

Your car leaks because of that and you don't make them to use 15w-50 instead of 0w-40?!

Bijan

Our other Mobil1 option here is 5W-50, apparantly the 0W-40 has better or more additives here and costs almost 50% more. Perhaps more Marketing . I had no leaks with the previous 5W-50.
I am having a top end rebuild in January including timing chain cover gasket replacements, the rocker gaskets have been fixed. It should be then OK on 0W-40
I can live with the minor leaks till then.

Pedro356C

If you live up north and the winter is around the corner, 0w 40 will do just fine...down here close to the tropics, you better look for higher viscosity or replace seals all over!

Feehliks

A 10W-30 is an oil which features a high drop in viscosity with climbing temperatures. Appearently, you live in Southern California (Newport Beach). Considering LA-traffic I would go with an oil which maintains a good viscosity as far as possible. This would either be 0W-40 or 5W-50 or 10W-60, all are very stable for high temperatures.

Just out of curiosity, I wonder what your oil pressure indicator shows under high oil temperatures at idle/3000/6000 rpm with the 10W-30.

Best regards,

Felix

texas911

How does lower viscosity oil "find" small holes to leak from? When oil gets hot, they all get pretty viscous. The lower rating is only a rating for low temperature viscosity. I think what might have happened is that the 0-40 has more detergent and cleaned out some sludge to expose those holes.