nklr 2-cycle oil - update
Posted: Sun Aug 09, 2009 6:25 pm
I found the following information on an ultralight aircraft site:
Oils formulated for outboard engines require a large amount of antioxidant and dispersant additives to control deposit formation since these oils do not contain detergents. Outboard oils also contain a large amount of rust inhibitors because an outboard engine's continuous contact with water makes rust prevention an important requirement.
Air-cooled oils contain lower amounts of antioxidants and dispersants, since the detergent additives do most of the work of preventing deposit accumulation. These oils also contain rust inhibitor additives to protect against rust that can form from water that enters the engine due to condensation.
Reference:
http://www.ultralightnews.com/features/oilworks.htm
-Jeff Khoury
----- Original Message ----- From: "Steve Dyer" To: "dsn klr650" dsn_klr650@yahoogroups.com> Sent: Sunday, August 9, 2009 12:16:18 PM GMT -08:00 US/Canada Pacific Subject: [DSN_KLR650] NKLR 2-cycle Oil List traffic is slow, so OK all you motor oil freaks... or as Nicholas Cage would have said in 'The Rock" (1996)... you motor oil SUPERfreaks... what are the major differences between 2-cycle motor oils and 4-cycle oils? I know the applications they're designed for, but what do we know about their differences from a manufacture/formulation standpoint? Today I ran out of the major brand 2-stroke 'chainsaw' oil that I use in the weed-eaters and the chainsaw. Dropped by the convenient local auto parts store in hopes they stocked this type of oil. Yes they did, but it was all some very cheap off-brands, and while the oil that winds up in these as well as our favorite brand bottles might very well come from the same vat, this stuff was just too el cheapo looking for me to happily dump it in my engines if there were alternatives. On the next aisle there was a closeout rack with some dusty old pint bottles of Mobil 1 synthetic 2-cycle motorcycle oil. It was about half off regular price, but despite its age I felt it might have been better stuff to begin with than the cheap brands so I picked up a couple pints. At the counter I told the sales guy this oil looked ancient and asked how old it might be. He just said 'ooo-old'. Bought it anyway but the whole episode got me to wondering what makes this oil different from 4-stroke oils, and once we're on 2-stroke oils what makes one better than the other, and what the hell is the difference between 2-stroke weedeater oil, chainsaw oil, motorcycle oil and marine engine oil? Steve in Norman, OK Stihl 031AV chainsaw Stihl string trimmer John Deere edger/trimmer [Non-text portions of this message have been removed]