Wish my local Auto Zones stores carried the correct motorcycle oil for my two R65s. That's a great price. BTW, is the Castrol motor oil you purchased marked as
4T motorcycle oil with an API-SG rating?
Robert Fleischer, aka: The Snowbum has an excellent essay on his website regarding specific oils for BMW Airheads.
http://bmwmotorcycletech.info/oilessay.htmThe following included quote is from his essay. Please check out the entire article as da 'Bum recommends several good SG-rated motorcycle oils.
Snowbum states:
"I cannot recommend Castrol motor oils, of ANY type EXCEPT for:
Castrol's 4T oil, (and Grand Prix oil, which is the SAME OIL) in either grade 10W40 or 20W50, as appropriate to your climate, is SG rated and formulated. Zinc component is 1100ppm; Calcium component is 1900 ppm; and Phosphorus component is 1000 ppm."
ZDDP is
zinc dialkyl dithio phosphate and provides needed protection of the flat tappets and cam lobes in the Airhead engine design.
Also, a good site is Phil Hawksley's UK-based web site. Here's a Airhead tappet gone bad due to using oil without the API-SG rating. Occasionally, the cam gets wasted along with both tappets. Expensive.
http://www.boxerman.co.uk/blackmuseum.htmWe haven't had a big oil thread in quite awhile. Hope this doesn't start one. :-/
Monte
