Quote:
Originally Posted by CalBears92
I'm beginning to feel this is the reason why Lotus USA is recommending the 5W40 instead of the 0W40. Perhaps there is something in the 5W additives that is not in the 0W  |
Their reason for recommending only that specific weight and brand is that it's the only one they've tested with the Toyota engine (and there's no incentive for them to test a bunch of others). It was clearly an informed choice, but they aren't so much saying "Mobil1 0W-40 will be worse for your engine" as they are saying "we simply haven't tested Mobil 1 0W-40".
And yes, I did email them and ask
John