Originally Posted By: Lurch
Originally Posted By: dsmith41
Originally Posted By: heavyhitter
Dude, dont put any 5w20, 5w30, 10w30 car oil in your bike.
Yes, those are energy conserving and will damage your clutch.
The why doesn't it seem to damage the clutches in the bikes the previous posters speak of?
I don't think anyone on this forum runs energy conserving oil in their bikes....if their bikes have a shared sump and a wet clutch (SSWC). In a SSWC, 40wt oil should be the bare minimum, as that engine/tranny set up tends to be very hard on oil and shear it rather quickly.
I would like to comment on the 15w40's and 5w40's that we have tried in our various bikes. I have no analysis to base opinion, but it is amazing to me how 'good' the 15w40's 'feel' when I make extended runs at 6,000 to 6,500 rpms. It seems like the oil really smooths out the engine when it is fully heated and flowing fast. This is in our two Suzuki DL650's (VStrom with a VTwin engine). Other oils I have tried seem to get a little rougher when hot and being pressed for performance, like a 2 hour run at 6,500 rpms. The 15w40's.....simply stay extemely smooth....(and I should note, a bit better than Rotella 5w40).
Although I have been a loud proponent of Delo (the addpak is monsterous!!!), both my sons (17 and 19 years old), swear that they like Delvac better, based on the 'feel' of the bike. (yeah, they are becoming oil freaks like their Pop.)
On another note, our Honda's that have a dry sump (600-650cc single, cylinder thumpers), tend to be sludge makers with the wrong oil. What I am speaking about is....we bought those bikes used and when we replaced a couple of lower-end seals, right after purchasing the bikes, we found a good bit of sludge (don't have a clue what oil they used). Anyway, I have this theory that Delo (and its addpak) is an excellent 'cleaner'. So for the first couple of short OCI's in those bikes, we ran Delo to clean them out. Then we gravitated back to Delvac....except in winter, when we run Rotella 5w40 (which should also be a great 'cleaner oil').
As I mention before....I was a Synthetic Oil Nut before discovering the 15w40's....and now that will be my oil 9 months of the year. I made the switch from synthetic back to dino and love it...love it!!!