And Yet Another Oil Question

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Sep 17, 2020 | 10:06 PM

Twilightblue28A

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And Yet Another Oil Question

When topping off my oil level, am I ok using 5W-30W Mobil One? To be clear, my question relates to adding oil not an oil change.

Thank you

Sep 17, 2020 | 11:08 PM

mike cap

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Assuming you’re using Mobil One in the engine now but just a different weight then you’re totally fine.

I wouldn’t mix brands of oil in my P car.

Sep 18, 2020 | 02:39 AM

pp000830

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Hi Harry,
As Mike says,
This is OK as there are 12 quarts of oil in the engine and adding even a quart or two will not significantly alter the effective viscosity properties of the oil fill. I don't even have a concern about it being the same brand as long as it is the same API specification as specified by Porsche for our cars.
Andy
Andy

Sep 18, 2020 | 03:01 AM

Twilightblue28A

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Thanks a lot!

Sep 18, 2020 | 05:12 PM

IainM

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Quote:

Originally Posted by mike cap

I wouldn’t mix brands of oil in my P car.

ican understand not mixing dino and synthetic but brands?
whats your thinking behind this?

Sep 18, 2020 | 10:05 PM

mike cap

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From: Upstate NY

Quote:

Originally Posted by IainM

ican understand not mixing dino and synthetic but brands?
whats your thinking behind this?

Generic response - brands should be specs like Andy said. His response is more accurate.

I use Motul now in the two P cars and was thinking I wouldn’t top off with Mobil One. But I’d specs are the same I guess I could.

Last edited by mike cap; Sep 18, 2020 at 10:06 PM.