Originally Posted By: GearheadTool
The instructions on their site range to anything from "use two bottles for 750-1000 miles, then change oil and filter" to "put 1 bottle in for 4000 miles with a Group 4 oil Royal Purple and another bottle on for 4000 mile Rinse phase with a Group 4 oil" (Royal Purple) So... Being the new owner of two bottles of this stuff, I am inclined to go out, buy some API SM Royal Purple, put a bottle in with each OCI and filter change, run each out to 4000 miles, and call it a day...
Royal Purple is Group 4 (IV.)
So the instructions specify using a group 4 syn. Wouldn't the oil itself lend to a substantial amount of cleaning on it's own,without the additive?
I dunno. There is so much conflicting info on this stuff which instructions do you follow?
It is either that, or put half or 3/4 a bottle in for about 1500 miles or so, and pray it doesn't damage my engine...