Hi Don, 1) Yes.
2) You betcha. 3) 5W-40 first choice, 15W-50 second choice, nothing else. 4) Uh - the answer to that is 'Mobil-1'. The 5W-40 is very similar to Delvac-1, and I believe both it and the 15W-50 have friction modifiers. Both would be fine for most motocycles with wet clutches, and I have used various M-1 weights in my bikes. However, for motorcycle use there is a special formula of Mobil-1 in various weights, that is designed for the MUCH different shearing loads seen in motorcycles, since the engine oil also lubes the sequential gearbox and clutch. In a nutshell, if the 'car' M-1 makes your bike act funny, use the 'bike' M-1. Most bikes aren't that picky though, despite some people's claim to the contrary. FWIW, my 300E uses about a quart every 1500 miles or less. I fill with M-1 5W-40, then when it needs oil, I top up with 30W dino. By the time it's due for a change, I probably still have more than half M-1 in the crankcase. Maybe I'll try new valve seals in that engine and see if it helps... :) -Dave M. > ------------------------------ > Date: Tue, 10 Jan 2006 16:22:50 -0600 > From: "Donald Snook" <[EMAIL PROTECTED]> > Subject: [MBZ] Here comes an oil thread -- Sorry in advance it is a > new topic though its about a gasser > > Okay, I am fully aware of the great level of debate regarding oil > brands. Dr. Booth had me convinced to switch and was going to but then > I sold the diesel. So, here's my question. Is Mobil 1 worth it in a > gas engine. I know that Mobil 1 is excellent at keeping soot in > suspension and lasts longer without breakdown in the harsh environment > of a diesel engine, but I have a few questions for my new (to me) > purchase 1990 300SEL 122k miles. > > > > 1. Should I use Mobil 1? > > 2. Does it offer the benefits that it does for diesels? > > 3. What weight should I use? > > > > These engines have some issues with valve seals after high mileage. > This car does not use/burn any oil in 3000 miles. Which makes me think > two things, it will eventually need the seals or it may have already had > them done. The original owner (bought it new sold it in 2003) had an > extended warranty and evidently had a lot of work done, so it is > possible it was already done. It had 76,000 when it was sold in 2003. > Is there any oil or additive, or snake oil that can prolong that I can > add or use to prolong the life of the valve seals?
