Simon,
I've run Mobil 1
Simon,
I've run Mobil 1, 15W-50 in my 365BB for at least 15 years without any excessive leaks. In the same breath, I've used 20-50GTX in virtually every other car I've owned...I, too, have heard the "rummors" that a synthetic may leak more. I've never found that to be true but can understand the engineering on how it could leak more...
A 10W-40, dino-based oil would be a safe choice, as well...presuming reasonable operating conditions.
Regards,
David
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