10-30 vs 10-40 oil

[furious_blue_imp]

My CB1100 had Yamahalube 10w-40 from the dealership at 600 miles, and at 1100 miles I swapped it out with Castrol part synthetic 10w-40 (I wanted to do 10w-30 but it was cheaper to get a jug of 40).

I just swapped it again at 3300 miles (Castrol didn't give me any warm fuzzies and I couldn't wait to hit 4000) with Amsoil 10w-30. So far, having fresh oil in the bike has made it extra smooth, I wanna say maybe even smoother than when I first rode her home. I can't wait to see how well this Amsoil will hold up over the next few thousand miles.

I am currently on Amsoil 10W30 too, going good so far. I really wanted to try that HP4s full synthetic from Honda..think I'll run HP4s next time..

Just ordered HP4 for 1st oil change. We'll see how it does. I've always run manufacturer specific oils on my bikes & outboards.

is it the HP4S full synth Fuzzy..? if yes please let us know how it goes..

I am currently on Amsoil 10W30 too, going good so far. I really wanted to try that HP4s full synthetic from Honda..think I'll run HP4s next time..

Just ordered HP4 for 1st oil change. We'll see how it does. I've always run manufacturer specific oils on my bikes & outboards.

is it the HP4S full synth Fuzzy..? if yes please let us know how it goes..
HP4 is a synthetic blend. HP4S full synthetic. To my knowledge the 4S doesn't come in 10w-40 only 10/30. I wanted to try 10/40.

This is correct. Honda's full-synthetic is not made in 10-40, it is 10-30 only.

Chip

Ah, that explains why my dealer only has Honda full-synth in 10-30 on the shelf.
Makes sense, if Honda were going to choose to distribute just one grade of full synthetic it makes sense to choose 10-30 over 10-40.. I'd like to use 10-30 and I *want* the '30' part of it to stay at '30' for as long as possible :-)