![]() ![]() When I drained my oil yesterday, it was close to the low mark. A less than perfect PCV system can cause more oil consumption. I considered the extra consumption was maybe related to the car wearing with age or the fact I'm living more at the higher end of the tach which is why I'm switching back. I plan on using LM for my next oil change. Tech sheets for the various oils mentioned above I think this is the big detriment to the OEM Castrol which seems to have a higher Nowak rating which doesn't help when it comes to carbon buildup. But the best part is the Nowak rating is only 4.7% and it has a very slightly higher VI and viscosity at 100C. It'll work in a road-driven vehicle over an extended interval unlike the 300V and it's a true Ester base. My next oil change, I'm going to try the Motul Sport 5W40 which basically sits between the 8100 line and the 300V line. I don't care much about winter performance as it doesn't get super cold here. I decided to try the X-cess as it has good viscosity at 100C, a Noack rating just below 10% and a high VI. In the end, I decided my prior experience of very little oil consumption with the Motul pushed me back in their direction after looking at a host of options from Pennzoil, Castrol (OEM), Mobil 1, Redline, etc.pouring over all their specs and taking price into consideration. I'm not sure if the 8100 falls into that category but from what I understand, it's a higher "grade" than even the Specific. I also read about Motul loosing a lawsuit in Europe recently as some of their formulations were using group III oils and not true group IV synthetics. I did a ton of research and spent quite a bit of time on the "Bob the oil guy" web page until acronyms made my head explode and left me with a less clear path to well, clarity. I decided to switch back to Motul, this time the X-cess 8100 5w40. With Motul, I'd had virtually zero oil consumption with the exact same driving habits. Car ran fine, engine was just as quiet overall but my oil consumption went from zero to about 1 liter in 5,000 miles. ![]() My last oil change I decided to make a switch to Liqui-Moly, specifically the 4100 Top Tech 5w40. ![]() 5L = 5.25 quarts.I've used Motul since day one of ownership of my RS5 and had been using the Specific 502 00 5w-40 and the X-Clean 5w-40. Packaging: This is a 5 - Liter bottle and priced per bottle. The 5W40 X-Cess is what our own service department uses on our personal cars. Motul's 8100 X-Cess Gen 2 100% Synthetic lubricant has been specially formulated to work with gasoline up to E85 Ethanol content and provide protection for the emissions system. API SN exceeds BMW's own Castrol - based 5W30 motor oil which has an API SL rating. It's also been approved for ACEA A3/B4 types (extended service intervals) and API Service SN (the latest oil standards available). This 5W40 synthetic meets BMW LL01 and LL98 approvals as well as VW 502 00, 505 00, Porsche, and Mercedes Benz specifications. MOTUL is among the most advanced full synthetic motor oils on the market today and used by SV Motori's shop and motorsports group. The newest generation of Motul's X-cess specifically designed for BMW's recent oil specification updates. ![]()
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