- Fri Dec 14, 2018 12:28 pm
I ran Lucas oil additive in my wife's 3.7 liter jeep for 45 minutes total and you won't like what I have to say about it.
It got the bearings that quick. She only had 57,000 miles on it when I screwed it up with Lucas.
That's when I learned about the importance of not using thick oils where they do not belong.
I left one quart of 5w 20 out so I could put one quart of Lucas in and that #### went in like gobs of honey, I cranked the engine and it rattled like a box of rocks. I read the bottle and it said it would break down to the right viscosity once the engine got to operating temp and stay that way but after 45 minutes of warm up and driving it still rattled so I pulled it back in the shop and drained the oil and that #### back out and that stuff was the first thing to come out of the drain and it came back out as thick and globby as it went in. After that the next two oil changes I found more and more bearings in the drained oil, so yeah I've used it and won't recommend it to anyone with these new tight tolerance engines of today.