Quote:
Originally Posted by Sportsguy83
So how do all of these oils compare to same grade motul, redline, amsoil?
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Motul and Amsoil make a bunch of different product lines, so it's hard to generalize, but here goes:
Motul 300V is targeted toward track use, so it's great for high temperatures but won't do long drain intervals. It also doesn't carry any API certification so it could present warranty problems.
Motul's full synthetic oils like X-Clean and X-Lite generally belong in the top tier, but many are targeted for European OEM applications and don't carry current API certification (SM or newer). Motul seems exotic and therefore
"good" here in the US, but in France gas stations have Motul signs all over the place just like we have Mobil signs here in the US. Same goes for ENEOS in Japan.
Amsoil Signature Series belongs in the top tier, but its primary claim to fame is long drain intervals, it's not necessarily that shear stable. It's also not API certified.
Amsoil OE and XL are pretty good, XL is about a half notch below the best big-brand oils. OE has the same base stocks as XL, but insufficient additives for long drain intervals.
Redline's street oils are fairly similar to Motul 300V, except they have sufficient additives for medium length drain intervals. Good for high temperature track work, but not necessarily better than more available oils for street use. Redline 5w30 performed pretty poorly in Amsoil's TEOST 33C deposit test. I've been using Redline 5w30 and 0w30 in my WRX until recently, see my UOA thread on NASIOC linked above.
Again, correct grade is more important than pushing past the point of diminishing returns to buy boutique oil. If I had an 86 I'd probably use Pennzoil Ultra 10w30 during the summer track-day season and the new PU 0w20 in the winter. In a warmer climate I'd use PU 5w20 in the winter.
Quote:
Originally Posted by bluesubie
Easy there. Solarent and Molakule on bitog (oil blenders,as you know) have actually stated that it's possible to achieve a good NOACK in a mineral oil without synthetic base stocks.
Although Pennzoil says:
11. The recent voas of Quaker State and Pennzoil conventional 5W-20s show extremely low NOACK. Are these oils getting GTL basestocks as well?
http://www.bobistheoilguy.com/pennzoil-q-a/
Key words, "At the moment", "primarily", "may", and "percentage". 
Unfortunately, Mobil1 does not list NOACK.
-Dennis |
Sorry, I didn't mean to imply I knew exactly
why the PYB NOACK came out so low in the PQIA test, just that the oil in that particular bottle was a lot better than the 14.7% NOACK listed on the PDS.