quote Garry in Tampa:
The 00 grade is thicker, it may not get into all the nooks and crannies in a needle bearing gearcase, that is Mercury, but would be fine with ball bearings . . . 😎
Gary actually NGLI 0 is thicker than NGLI 00 based on ASTM D271 cone penetration test. NGLI 000 has most penetration (lowest viscosity) and NGLI 6 has least penetration and is thickest (highest viscosity) based on the NGLI (National Gear Lube Institute) scale.
Ref see pg 13
http://www.infomine.com/suppliers/Publi … eAug08.pdf