Oil Weight

Shotgun · September 21, 2005, 10:20:54 PM

I am running Yamalube 4, 20 w 40 in my 2004 Eiger. The oil seems really thin when the engine is hot, almost like water. Should I go to a heavier weight oil? Thanks

johnnygun · September 25, 2005, 10:20:55 PM

is that a synthetic?

how long you runnin it between changes?

#74 crf250r · September 25, 2005, 10:53:23 PM

yea call a shop and they will look it up for you or if you have a manual it will stay in there

Shotgun · September 26, 2005, 12:14:02 AM

The oil is not Synthetic, I change it every 300 miles or so.

johnnygun · September 26, 2005, 10:06:11 AM

thays not too many miles / hours. definitely check w/ manufacturer and get their recomendation. how often and what to use.

synthetic oil is very lite, the flow rate is one of the reasons it's so good. new / old, hot / cold, it flows about the same.

in florida with the heat, i would think a heavier oil. oh well, that's my 2cents.

good luck.

Truegrit · September 26, 2005, 10:42:09 AM

I use Honda 10W-40 oil. Thtas what is recomended for my bike. I have tried Honda 20W-50 once. It took noticably longer to warm up the bike than w/ the lighter weight. That was in 80-85 degree weather.

Shotgun · September 27, 2005, 06:40:44 PM

What oil is thicker, 20w40, or 10w40?

Nocturnal · September 28, 2005, 06:09:06 AM

Quote from: Shotgun on September 27, 2005, 06:40:44 PM
What oil is thicker, 20w40, or 10w40?

20W40 is thicker when the engine is cold but, there both the same once it heats up.

Shotgun · September 28, 2005, 06:21:14 PM

Thanks, I thought it was just the opposite.

Nocturnal · September 28, 2005, 11:33:42 PM

Glad I could help.

TRX350_On_The_Rack · September 29, 2005, 11:22:22 AM

The Honda manual for my Rancher says:

RECOMMENDED ENGINE OIL:
Pro Honda GN4 or HP4 (without molybdenum
additives) 4-stroke oil or equivalent motor oil
API service classification: SG or higher
JASO T 903 standard: MA
Viscosity: SAE 10W-40 or SAE 20W-50

I've always used the Pro Honda GN4, but thinking of using regular oil if it meets the specs. Also I change the oil every 20 hours instead of the 100 hours recommended by Honda.

xtremeraptor · September 29, 2005, 10:02:51 PM

I RUN 20 50 IN MY RAPPY AND IT COMES OUT GOLDEN BROWN AND NICE AND THICK EVERY TIME I CHANGE IT