I just began using No Toil air filter oil, I was using the Belray. I noticed my exc 250 02' starts virtually on the first kick now, using the no toil also changed my jetting. The bike had been running rich for some time, I noticed that using the no toil helped the bike breath better, which changed the richness. I have only had three rides so far, but the no toil seems like the way to go, but I think it very important to use the rim grease as the noil toil itself is not good at sealing the rim of the air filter like Belray was. :thumb: