Would someone please give me a straight answer on which oil to use in my Rubicon. I have heard conventional, synthetic, and honda oil itself. I have pretty much made up my mind to use Royal Purple 10w-40. Yes or No?

 

Right from the honda service manual for the Rubi. Recommended engine oil : Honda GN4 4-stroke oil or equivalent motor oil. API service classification SF or SG. Viscosity 10W-40.

 

by the honda 4 stroke oil



RANCHERS RULE

 

Our Rubicon is an early 01. Checked the oil pressure today at both 1,400,rpm and 5,000 rpm, perfect. I change the oil and filter every 500 miles, period. I have never added oil between oil changes. Our Rubicon carries 400 pounds everywhere. We have over 3300 miles on it. All I have used is Valvoline 10w40 All Climate oil. Next oil change I will use Valvoline ATV 4-sroke 10w40 oil, it hase the same SF/SG rating as recomended by Honda but also has friction addatives for the clutch, something Honda GL4 doesn't. Valvoline 10w40 $1 qt, Valvoline 10w40 ATV oil, $2 a qt.