Alright, I also own a Mercedes and a Range Rover. I do all the oil changes on them and my Mustang. One thing I notice is the Mustang is "dirtier" then the Euros. They all get 5K oil changes, same oil Mobil 1 - Full Synthetic from Costco and all get genuine filters all have similar mileage. The issue is the Mustangs oil gets dirt black quick, the other cars almost stay clear till the 5K. Each weekend I check and top off fluids on all cars. Just in the wipe of the dipstick gives me clear oil on the euros and dirt black on the Mustang no matter the age of the oil. I have decided to do 3 oil changes on the mustang with just a week apart about 150ish miles between the "rinses". Aside from the "environmental impact' - BTW, I have a V8, all-wheel drive, 12 MPG Range Rover - obviously its not a big concern. Will the rinse work? - I don't know, but gonna try. Opinions, suggestions, thoughts ? Thanks.
Well, Mobil 1 hasn't been a "real" synthetic in quite some time, it is one of the lesser-quality oils on the market these days, mostly getting by on their name and marketing.
Get a quality oil in there like Amsoil or something from BND Automotive, a company that does custom blended oils/fluids. I've used both and Amsoil is a close second to the BND stuff, which was still see-through a few thousand miles after going in.
Side note: on my '07 Charger 5.7 when I switched to Mobil 1, I started losing about a quart every thousand miles or so.
Switched to a BND Automotive custom blend and my oil consumption went away.
I'll never use or recommend Mobil 1.