No cons I can see using this product in 3 different vehicles The worst is my old 4x4 Durango with 220K miles. It's valves chattered and the lifters ticked constantly for 120k miles and nothing has helped. I was still burning oil this time even after using Restore, I used this one bottle with 1k miles left before my oil change, within 20 miles i could feel my engine begin to chill out. It works !!! My oil pressure is holding steady and no more chattering and ticking It might be the placebo effect but I've been driving this same vehicle for over 20 years now and it has definite increase in hp and performance
Verified purchase: Yes | Condition: New
I used Rislone back in the 1960s in engines that had been setting out of use for a year or more with fine results. Was so happy to find the product still available. It still does an outstanding job for those collector cars and trucks that set idle more than they run...........Keeps rings and internal parts working as intended.
Verified purchase: Yes | Condition: New
Bought it because it's been around a long time. Don't know yet, how well it will work, just put in recently. The lifters do seem quieter.
Verified purchase: Yes | Condition: New
I USE IT TO QUIET A NOISEY LIFTER ON MY 5.3 CHEVY V8. IT SEEMS TO HELP.
Verified purchase: Yes | Condition: New
Been using rislone since 1983. Clean motors and no oil related failure
Verified purchase: Yes | Condition: New
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