Originally Posted By: dparm
Is something like CFS 10w60 NT safe for use in a road-going vehicle? I see no API or ACEA info on the product datasheet, nor a TBN.
Additive pack is based on meeting SM spec, but I believe it meets SN. It is listed in the "performance profile" section of the data sheet. Except, of course, for the elevated ZDDP, which prevents the oil from meeting it. TBN is 11.0
I use 10W50 in my 968, we have several customers using the CFS NT in their street cars, one example is this guy:
430 horse/475 lb-ft 335i daily driver. The only "caveat" would be the ZDDP level, see below.
Engine oils that use NT (CFS - Competition Fully Synthetic, EE = Energy Efficient street oil):
CFS 0W20 NT
CFS 0W30 NT
CFS 5W40 NT
CFS 10W50 NT
CFS 10W60 NT
EE Longlife C3 5W30 (BMW LL-04, MB 229.51, other ACEA C3 spec applications)
EE Longlife ECO 5W30 (European Ford spec, don't recall details)
EE 10W40 (semi-synthetic - we do not currently stock this)
Gear oils using NT (CRX is the race gear oil, EE is the Energy Efficient street oil):
CRX 75W90 NT
CRX LS 75W90 NT
CRX 75W140 NT
CRX LS 75W140 NT
EE Transmission 75W90
Is it "safe?" It has elevated ZDDP levels, which prevent it from meeting the spec. Great for protecting your engine. But over the very, very long term, it can poison the catalytic converter. Cat poisoning can be reversed through running the cats at higher temperatures for a period of time. In other words, if you do the occasional track day, you'll probably be burning it all off. All that said, cat technology didn't change appreciably when they starting taking out ZDDP, and the specification initially was limited to the 20 and 30 weight oils. So I'm not convinced that the EPA's position is entirely sound. That is the only thing that would be prone to making it a risk. The biggest reason to stay away from a race oil in a street application is typically when they have very reduced additive packs, which drastically limit their lifespan. The Millers has a very good, robust additive pack that will allow the oil to be run for a very long period of time without the need to change, or without risk of becoming acidic.
Funny you mention this, from the time I started this e-mail until now, I just fielded a call from a potential dealer in Canada who asked specifically about the 10W60 in the context of the E92 M3's spec. Never realized they spec'd a 10W60.