I know that people will say that there is no one answer but what I'm looking for is a dino thats fairly thin at start up. I was thinking about trying a thick 5w20 like castrol gtx but they dont list there 40 cst #s on their pds. When I wrote them about it they told me they cant tell me because its a super secret! Everyone else lists that so I'm betting that its thicker than gravy at start up.