quote:I, too, am obsessing about 40 weights (whether or not Buster is admiting to it) I'm considering using one in a camry V6 even though $4 to $5 10w30 oils are doing o.k. I'd like to lower Lead in UOA to less than 10ppm. I think the M1 15w50 would be the better option. Cold flow of the M1 15w50 is very good. The sacrifice is lower gas mileage with 17 cst at 100c. For summer and mild winters, I like Delvac 1300 15w40. But I may be searching for something unattainable. Maybe 10ppm lead is what my engine is supposed to show at 6K intervals. Either way I'm not willing to spend $6 or more per quart of oil (Redline, Amsoil). If thicker is not better, my preference is Schaeffer Blend 5w30 or 10w30. They have a very nice balance of cold weather capability, HTHS of 3.5, and FM's for gas engines. (and nice tannic overtones....) [ March 23, 2003, 10:38 AM: Message edited by: jjbula ]
Originally posted by YZF150: Buster, are you obsessing on 40 weights? You've been asking and posting about them for weeks. We all thought that you'd decided to go with the Delvac 1 after a score of members convinced you that it would be OK for your 4 cylinder. Why would you even think of a motorcycle oil? The additive package is inappropriate.
quote:My understanding is that M1 15w50 is not primarily intended for diesels like the 15w40's are.
Mobil 1 with SuperSynTM 15W-50 is especially suitable for high-performance cars, particularly hot-running or heavily loaded vehicles and special high-tech imports.
quote:Their 0w40 more than covers the need for 10w40. If you look at it's specs, it's very similar to most 10w40s in viscosity at 40c and 100c. It's just that in extreme cold it flows better. So why would Mobil 1 need to make a 10w40?
Originally posted by buster: The specs are good. I see this oil at autozone and advanced auto parts all the time. I still can't confirm if it can be used in a car. Mobil's website does mention that you can't use car oil in a bike, but they don't really say specifically you can't use the MX4T in a car. I wish Mobil made a 10w-40 car oil.