SR5: Thanks for the info on motorcycle oil. I didn't realize that motorcycle oil had extra ZDDP. I use Shell Rotella 10W40 in my '63 Studebaker R/2 Super Hawk due to the higher level of ZDDP in that oil.
Originally Posted by kschachn
Lol. Are you sure you're new here?
Yes, why? Has Auto-RX been discussed here before? What was the verdict?
Probably a scam since I've never heard of it before.
Does anyone have any experience with this product?
Auto-Rx
I checked out their website and read some of the forum entries and it looks like an excellent product. Has anyone used it in a Mercedes M119 engine? Even though my engine is not suffering from sludge, perhaps it would benefit from a...
kschachn: Perhaps I was confused about the winter rating. I did not realize that the 0W-XX oil can be thicker than its 5W or 10W counterpart.
Currently, the only approved oil that I would consider is M1 5W50. 15W50 is listed in Owner's Manual chart below, though a brand name is not. I am sure...
Summit Racing has M1 5W-50 for 7.99/qt. but honestly, I don't particularly like the idea of a low viscosity oil of 5 to xx in a hot climate and an older, high-mileage engine, such as mine.
Originally Posted by kschachn
Which is only API SN, SM, SL, SJ and ACEA A3/B3, no Mercedes-Benz approvals at all. High viscosity is not necessarily a substitute for an approval.
This link indicates that Mobil 1 Tri-Synthetic Formula 15w-50 is approved by Mercedes:
Mercedes Approved Synthetic...
tiger862: Yes, that is how I understand viscosity.
JustN89: Agreed. I just went to Walmart and purchased 4, 5 quart jugs of M1 15W50 for $91.52 or $4.57/qt., hard to beat that price.
kshachn: I can purchase M1 15W50 for $4.57/qt, ($22.88 for the 5 qt jug) at Walmart. Sometimes the 5 qt jug is as high as $28.00. My engine does consume oil - typically during a 6,500 mile oil change interval I have to add 2 additional quarts, sometimes a bit more.
Kschachn: Thanks for the excellent post. You have put the issue well into perspective. I now know that there's a lot more to it than just the type of base stock.
Kschachn & SubieRubyRoo: I just spoke to a Mercedes dealer and confirmed that Mercedes-Benz approval 229.3 is correct for my '94...
SubieRubyRoo: I will add: Your question regarding what I am trying to accomplish with a fully synthetic oil is a good one. I maintain my vehicle meticulously and with 240K I want it to last a lot longer without needing major/catastrophic repairs. My E420 still runs "like new" and I want to keep...
LubeFiner: Thanks for that information. This morning I looked down into the engine from the oil filler cap and I can't tell definitively, but the cam shaft(s) appear to be slightly cleaner than when I was using Mobil 1. There's still a rich/golden-brownish hue, but by no means could it be...
sloinker: Unless I'm reading it incorrectly the Ravenol website states that the RAVENOL RFS SAE 15W-50 is fully synthetic, while the exact same oil is listed as semi-synthetic everywhere else I look.
Yes, it is difficult to find a fully synthetic (group IV or V) motor oil in 15W50. Liqui-Moly...