Shell Rotella T4 vs T6, what oil for CG engines?

[ProDigit]

I've been using the T4 15W40 oil on my Vader and other china bikes with success.
The T4 is a Jaso MA rated oil, and what that means is that it works for a wet clutch.
The clutch is a bit grippy, so I'm thinking of going to an MA2 rating, like on the T6.

The T6 comes in 5W40, 10W30, and 15W40 flavors.

The T5 is said not to be for wet clutches, however there was a few years when they did put the 'for motorcycles' logo on the jug.

I want to use a lighter oil for better MPG, but not sure if I can use any of the oils they make?

From the pictures online, it looks like the 15W40 and 5W40 is Jaso MA2 certified, but the 10W30 isn't.
Meaning, there's a chance the 10W30 will cause a slipping clutch.

I don't particularly need 5W40, as the weather here isn't very cold.

So I was wondering how the T6 15W40 compares to the T4 15W40?
Does it perform better, like, getting a less grippy clutch?

[Mudflap]

I use either T4 or T6 15w40 in my CG engines and other engines depending on what's on sale or what happens to be in the garage. Can't say I've noticed any difference at all.

[GypsyR]

I've been using SuperTech 10W40 or Mobil 1 10W40 for years. Whichever WalMart has on the shelf when I'm there. I can't tell the difference between them. They both work fine in the half dozen bikes I have. And if there's any difference in clutch action I can't tell it.

Sometimes I buy Rotella but that's because I have diesel truck. I haven't bothered with using any in a bike.

[ProDigit]

The CFMoto bikes use jaso ma 2 oil. And the clutch is very slippery.
I'm trying to understand what oil is best.
I've ordered shell rotella T6, to see if it makes any difference on my Vader.

[bigdano711]

I started on the T4 Rotella and I had difficulty finding neutral when the bike was at operating temperature. I switched to Valvoline 10w40 full synthetic motorcycle oil and now I have no problems finding neutral and a much smoother clutch all around. I bought the stiffer clutch springs, no need to install.

[GypsyR]

I forgot the Valvoline motorcycle oil. I too have found it to work very well also.

[ProDigit]

So what motorcycle oil makes the clutch very smooth, without slipping?

[bigdano711]

Originally Posted by ProDigit

So what motorcycle oil makes the clutch very smooth, without slipping?

Answered, scroll up.


Edit: Oh, you're looking for the arrogant, know-it-all google genius answer. I don't play that game anymore. Like I said, you remind me of me 20 years ago.