Roil Metal Conditioner

well if it is not marketed by a major oil company you have to wonder why
personally would not touch the product in a modern motor
oils are highly specialist and adding additives can have a bad effect on the oil
contact your motor car company and see if they approve its use

Seen some interesting data on roil from university of Queensland.
Roil is similar to bitron both being oil based. I have used bitron in all my vehicles since 98 with good results. Saved my gearbox in my old Jack when the seal between gearbox and transfer went and transfer all the oil to the transfer case.
I am dubois about promar and and slick 50 as they contain solids which can block oil galleries.
I was impressed by Bitron because they provided testimonials with full names and phone nos so you could ring the actual person which I did. I got and engineer to dupicate swome of the tests and he got similar results to those advertised. I have a 17 year old mower(rover suziki) that the motor is still perfect on and it has never been touched. Cleaned the air filter twice. lol
Cheers Pete

Yes, I have used this stuff. No success. I had an oil burning perkins motor in an old truck. It used about 3 litres every 100 km. put in the roil following the instructions to the letter. No different. We also have our smokey lawnmower. Same thing. Rus.