993 TT oil recommendation?
11-21-2009, 09:11 AM
#17
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Rennlist Member
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I have talked pretty extensively with the regional Motul distributor regarding Motul oils. The 8100xcess in 5w-40 is Porsche approved, and I run that in my 997 turbo. He sent me a case of 300v to run in my 944 turbo and 993 turbo, but warned that the service interval for usage in the 993turbo should be relatively short since the 300v does not contain some stabilizers which allow it to remain suitable for long term street usage.
11-24-2009, 01:47 AM
#19
Based on the information on Mobile 1's website (pasted below), I don't think it really matter between either Mobil 1 15-50 or the VTwin. I'd say get which ever one is on sale. In all likely hood your internal engine bearings, rings etc are going to last a long time... it's the exhaust valve guides that going to get you at some point within 100k miles. If there's an oil solution to this, I'm all ears!
From Mobile 1:
Question:
Any Problem Running Motorcycle Oil in an Older European Race Car?
My older sports car came with 20W-50 from the factory. My mechanic recommends using 20W-50 Mobil 1 (V-Twin Motorcycle Oil) over the 15W-50 Mobil 1. Since this is a pre-catalytic converter era car he prefers the slightly higher levels of zinc diphosphate contained in the 20W-50. Since the car was designed to run at high rpms and will be primarily used in the summer he has indicated that it's his preferred choice over your 15W-50 Mobil 1 and Castrol's 20W-50 "Classic" formulation. Any problem in running a motorcycle oil in an older European race car such as this? Thanks for your help.
-- John Bauer, Utica, MI
Answer:
The most important difference between a motorcycle formulation and an automotive formulation is that the automotive oils contain friction modifiers for improved fuel economy. Frankly, you are using 50 grade oil, you are probably not looking for fuel economy. So as you can see using the motorcycle oil in your vehicle is not an issue. Comparing the two oils, the main point of differentiation, beyond the motorcycle needs, is the level of ZDDP antiwear additive. Either product offers a robust level of antiwear with 15W-50 @ 1200 ppm phosphorus compared to the 20W-50 @ 1600 ppm.
From Mobile 1:
Question:
Any Problem Running Motorcycle Oil in an Older European Race Car?
My older sports car came with 20W-50 from the factory. My mechanic recommends using 20W-50 Mobil 1 (V-Twin Motorcycle Oil) over the 15W-50 Mobil 1. Since this is a pre-catalytic converter era car he prefers the slightly higher levels of zinc diphosphate contained in the 20W-50. Since the car was designed to run at high rpms and will be primarily used in the summer he has indicated that it's his preferred choice over your 15W-50 Mobil 1 and Castrol's 20W-50 "Classic" formulation. Any problem in running a motorcycle oil in an older European race car such as this? Thanks for your help.
-- John Bauer, Utica, MI
Answer:
The most important difference between a motorcycle formulation and an automotive formulation is that the automotive oils contain friction modifiers for improved fuel economy. Frankly, you are using 50 grade oil, you are probably not looking for fuel economy. So as you can see using the motorcycle oil in your vehicle is not an issue. Comparing the two oils, the main point of differentiation, beyond the motorcycle needs, is the level of ZDDP antiwear additive. Either product offers a robust level of antiwear with 15W-50 @ 1200 ppm phosphorus compared to the 20W-50 @ 1600 ppm.
