Spoke w/a lucas rep about this oil. has a base # of 14. i was told this oil is designed for 15k mile oil changes, 25k w/sampling. $16/ gall.at oreillys. i usually run my oil 5k, w/this i'd probably run 10k. but 15 w/o a bypass? also, i've read that any oil w/the api stamp will provide the protection needed for it's designated service application.
any comments from the informed.

john
95 auto w/237k, cc, lb, cstm lthr seats(w/massagrs), billet tc, hvy duty tranny w/upgraded v body, 4.10's, 235/85 bfg commercials(19.46 mpg hwy), kdp tabbed, gov set to 2.8k, grnd stock pl, timin advanced, more boost, air shocks, more fun.

 

How does it compare to Rotella 5-40 synthetic? The price is almost the same.

 

I've always smelled snakes around Lucas products... but that doesn't mean they aren't worth something. I did once use a jug of their Auto trans fixer to help a Caravan get to an auction...

For my general maintenance, I like to run by manufacturer's suggestions on fluids. If the intervals are to be exceeded, I would do some testing, even if just to find out if the baseline extension is compatible with your setup/driving style/etc.

 

i used lucas in my tranny- nv 4500- and it discoloured after 1500 km. i also had to rebuild the tranny after 65000km #2 tranny. so #3tranny rebuild got mfg spec. nothing else and i have checked it lots great color and no smell