Are synthetic oils and lubricants any quicker

[Alan Roehrich]

Originally Posted by 8secchevelle

Alan I had this conversation with mr. B about the gl6 lube but I have not been able to locate any , is it available in the Nashville area? Thanks .

Richmond synthetic gear oil is API GL-6. I suspect that Royal Purple synthetic is also API GL-6, although they say to use it where GL-4 or GL-5 is required, it is not actually API rated. Torco and Redline both state their gear oil is GL-6.

The GL-6 designation is no longer required by any major OE, and as such is considered "obsolete". However, GL-6 is precisely what is required for drag racing, as it is the oil required for high hypoid, high pinion offset, extreme impact, extreme load applications.

You probably will not find a GL-6 lube on the shelf at a typical parts house.

Note that the looser you run your gears, the higher viscosity you need for severe impact protection.