I used the same Castrol on my last change but in 1040. Same reason; good oil, good deal on AmazonI had Rotella in it for a month. Then switched over to Castrol 10W50 because I live in a hot climate. Bought 6 quarts from Amazon. Good price.
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Friction modifiers were the culprit in your clutch slippage, not the oil itself. Avoid oils that have "Energy Conserving" or "Resource Conserving" on the API seal.I learned the hard way that synthetic oil made my clutch plates slip on my 2003 Vulcan Classic and had to replace them. Mine is lubricated via the crank case oil so how is it no one else has had this problem?
There are a number of full synthetics under the Mobil 1 brand. A couple are for motorcycles and would not have friction modifiers. Some are for cars with and without friction modifiers. If you used one of the ones for cars, it's quite likely that you used one with friction modifiers.It's been quite a while ago but I believe it was Mobil 1 full synthetic, but now I'm wary to try it again.
If doesn't say JASO MA1 and MA2, leave it alone. I lost a full set of clutch plates on a VTX 1800 with 10K miles because i didn't read the fine print on Mobile oils.There are a number of full synthetics under the Mobil 1 brand. A couple are for motorcycles and would not have friction modifiers. Some are for cars with and without friction modifiers. If you used one of the ones for cars, it's quite likely that you used one with friction modifiers.
You can get oils that are not full syn that have friction modifiers, so just staying away from full syn and not educating yourself on what to look for in a motorcycle oil can land you in the same situation again.
I just tried Rotella. so cheap, many good reviews. I am having wonky shifting issues as well. 2nd gear usually. I’m going back to Valvoline Dino mc. easy to get, fairly cheap, and the quietest gearbox out of all the Dino oils I have tried.Bike is a 2009 900 Classic with 2500 miles. Changed oil to Rotella and the shifting seemed off. A lot of false in gear and then popped back into neutral. Changed to the Castrol and have driven 200 miles with no issue.
Huh? The weight for moderate and hot climates is the same on both. 40 weight. The 5 and 15 are the cold weather winter weights.Rotella T6 15w40 Synthetic oil is JASO MA1 and MA2. However, it comes in two weights 5w40 and 15w40. My Vaquero shifts well on the 15w40. However a friend of mine used 5w40 and had shifting issues as well. He switched to 15w40 and all was right with the world. Many oils of the Semi Syn Rotella oil doesn't say JASO MA1 and MA2, read the label.
Not all weights are rated JASO MA M2 ,Stay with 15-w40.
Note:5w40 Does not appear to be a viable option. Way too little weight for moderate and hot climates.