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+--- Thread: 10w40 (/showthread.php?tid=6212)
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RE: 10w40 - Darpo_imp - 08-29-2013
(08-28-2013, 10:37 PM)HondaJon_imp Wrote: Just curious, who is running 10w-40 in their bikes? I live in FL and it is HOT! I just noticed the owner's manual only mentions 10w-30, but the service manual lists both.
I have always run AMSOIL 10-40 in all my air cooled bikes without issue.
I'm at 2700 miles and for the first 2 changes I stayed w/ the recommended 10w30 honda. It too gets steamy in the Carolinas and for this last change went w/ the Amsoil 1040 full synthetic and love it. Super smooth and crazy as it sounds feel a performance boost in the sweet spot of 5-7,000 rpms. Read so many good things about full synthetic and especially the Amsoil. I know there are tons of opinions, but this works for me. ride safe!
RE: 10w40 - hl9td_imp - 08-31-2013
Not really an oil guy but I can find nothing in owners or service manual that states other than 10w-30 oil. Info on Japanese Honda site is same. My only experience in this area is with my T100; use 20w-50 Mobile full syn and works great as far as lubrication goes. Regular oil (dino 10w40) went bad within 500-750 as tested by engine lab. Mazda Miata asks for 5w20. Put in 10w30 and way down goes the milage. Who knows? But it is fun to discuss in a friendly manner!
RE: 10w40 - Deanohh_imp - 08-31-2013
(08-31-2013, 07:29 AM)hl9td_imp Wrote: Not really an oil guy but I can find nothing in owners or service manual that states other than 10w-30 oil. Info on Japanese Honda site is same. My only experience in this area is with my T100; use 20w-50 Mobile full syn and works great as far as lubrication goes. Regular oil (dino 10w40) went bad within 500-750 as tested by engine lab. Mazda Miata asks for 5w20. Put in 10w30 and way down goes the milage. Who knows? But it is fun to discuss in a friendly manner!
service manual, page 3-14.
RE: 10w40 - hl9td_imp - 08-31-2013
Deanohh:
Thanks saw that. 10w40 in chart for exact same range as 10w30. However, all stated specs are for 10w30. Seems Honda can either type or make charts; our choice!
RE: 10w40 - Deanohh_imp - 08-31-2013
Look in the margin note.
RE: 10w40 - Jim21680_imp - 08-31-2013
So, I have 10/40 in my bike and live in the mid-Atlantic climate. Should I change to 30 before winter?
RE: 10w40 - hl9td_imp - 08-31-2013
Deanohh:
Good one.
At least now I saw to also replace the filler cap when done. 
RE: 10w40 - Aussie_imp - 08-31-2013
I use 10w40. It can get over 105 degrees F in South Australia during summer.
RE: 10w40 - HondaJon_imp - 08-31-2013
(08-31-2013, 07:29 AM)hl9td_imp Wrote: Not really an oil guy but I can find nothing in owners or service manual that states other than 10w-30 oil. Info on Japanese Honda site is same. My only experience in this area is with my T100; use 20w-50 Mobile full syn and works great as far as lubrication goes. Regular oil (dino 10w40) went bad within 500-750 as tested by engine lab. Mazda Miata asks for 5w20. Put in 10w30 and way down goes the milage. Who knows? But it is fun to discuss in a friendly manner!
Take a look at page 3-14 in the service manual. I'm running with it. Too hot here in sunny FL..
