Has anyone used Seafoam

[willtill]

Which weight of Rotella did you use, and did you like it? I'm curious because I've heard comments about clunky shifting with the 5W-40. I've thought about switching because the T6 5W-40 and 15W-40 are JASO MA/MA2 certified, which Honda specifies for our bikes. I don't know of any other diesel or automotive oils that meet those standards, including the Mobil 1 I'm using.

Switching may not be an option these days as Rotella is in short supply. Last week the local Walmart had some on the shelves for the first time in months, but it quickly disappeared.

I used Rotella T6 5w40. Shifting seems normal to me.

[maxrider]

Okay, I add to the mix, I have been using this, works on my Ironbutt rides has no issues, is delivered to my door, and at a good price.

Change oil every 5K miles on principal, regardless of brands I have used prior.

5K is just cheap insurance.

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Kirkland Signature Heavy Duty Diesel 15W-40 Motor Oil 1-Gallon, 3-pack
Item 1448220
Your Price39.99$
Price Per GALLON: $13.33
Shipping & Handling Included*
Limit 6 Cases Per Member

Features:
3-1 Gallon (3.78L) Bottles
SAE 15W-40 CK-4 Diesel Engine Oil
Increased Wear Protection
Better Oxidation Control
Highly Shear Stable Formulation

I used Rotella T-6 15-40 prior to the last few changes, do not detect any difference between them, no shifting issues, or noise, etc.