I'm unsure of putting it in Lucy. ('90 NA) I've already put half the bottle in my mom's F-150, but the oil needs changing anyway and it already burns, can only improve.

I've heard about people putting the stuff in their RX-7s and oil-control-ring issues going away. (very attractive to me right now). But I want to know what the long term issues are with it, if any. I'm just skeptical of a product that so many people call a magic bullet, there has to be a downside or two.

 

I've been using one quart with every oil change for about 60,000 miles now. I swear by it. I even started using their motor oil too now. I have not yet met a Lucas product that failed to perform as advertised.

Seafoam (in the gas tank) is also good every couple of months.



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i have used the thick three ( lucas, moreys, true blue ) a few times in the past

with zero ill effects,, and as up to 50% concentrations in NA engines

i have also used it in turbo engines
though i stick to the recommended max of 30 % there to avoid potential to varnish the turbo oil galleries
( not that i have seen any noticeable residues on any of the engines or turbos pulled down after having been used thus )

it will cut down on cold start smoke,, and over run decel smoke ,, up to a point
it has in the distant past allowed me to go 6- 12 months further on tired engines that were almost unmanageable for oil smoking


i also use 1/3 moreys, 1/3 heavy gear oil and 1/3 tranny fluid blends my worn gearboxes

- including a 12at box that survived many years behind 250 -350 rwhp turbo engines
( provided with careful launches )

PS
i do not advocate any additive that is not 100% petroleum based that has residual particles in it

 

yes iv seen a very less smoke issue and now that i found this ill be putting it in alot more thank you!!!