For the past 3 oil changes Ive been using one quart of Lucas oil and 4 quarts of castrol GTX.(5w/30) Ive always felt the car get smoother with idle except for recently my idle is rough due to something when I changed my mevi. Everyone says its pretty good but I would like to know from anyone else using lucas oil.

Thanks.

 

BITOG has some tests showing that lucas causes bubbles in the oil, personally i think it must be pretty good stuff cause its got the lucas name but then again have you considered Lube Control?

 

I would not use lucas in a new car engine, but in an older car that has higher milleage, its good stuff. it will cause the oil to foam at higher rpms, so be careful

 

http://www.bobistheoilguy.com/images/lucas/lucas.htm