Join Date: Jul 2007
Location: Elgin, IL, United States
I found the same issue. The only Castrol oil I can find in stores has an API rating of SL or SM. Not the recommended SH? Usually an oil question will be ignored or cause a million different opinions. Did you try doing a search?
2007 BMW K1200 GT
2006 Harley Davidson VRSCSE2 (totaled)
2005 Honda ST1300 (traded-in)
2001 Honda Valkyrie Interstate (sold)
1997 Honda Valkyrie Standard (sold)