Originally Posted By: Clevy
Originally Posted By: ryanschillinger
Funny because I've noticed additives sometimes work in one vehicle but not in another. The Lucas fuel treatment used to do pretty well in an older Corolla, but didn't help mileage in my 99 Corolla. Different engines and stuff but I haven't used it since then. Wonder if it would do well in the 13 Corolla or my civic. MMO is cheap though, under $4/qt at Walmart when I was there the other day. I bought 4.
I've had the same experience. some vehicles respond well to some additives while others don't. It could have something to do with mileage and previous maintenance.
When I acquire a new to me vehicle I do various flushes,piston soak,top end clean through a vacuum line,then a few short intervals using a flush type product at the end of those short intervals so I know I, starting off with as clean a slate as possible.
Then I'll start extending intervals and so on.
Since there are millions of vehicles being driven and maintained differently by millions of folks it seems quite likely that some will respond to an additive and others wont.
IMO there are places for MMO to contribute for a limited number of folks, and since it likely causes no harm it is safe enough to try...