Lucas, Seafoam etc.

[rowan782]

Currently delivering parts for NAPA, before that I did same for Parts Plus, they like to get over 200,000 miles on vehicles.  I am here to tell you that both places never use ANY additives in their fleet.

[Robert Street]

nor do I with 2007 ES 350 Lexus 250,000

Robert

[captndan]

When I worked for NAPA OTR trucking companies bought Lucas by the case.

[padgett]

I have not used any oil additives for years. Do use Mobil 1 and change the filter every time the oil is changed.

 

Have used Seafoam Transtune for sticking automagic transmissions before.

Edited July 4, 2017 by padgett (see edit history)

[TerryB]

It's unlikely to need or use additives with modern cars.  It's usually the older cars that have sat for weeks or months that sometimes get a shot of some type of additive to clear out the effects of the long storage.  Sometimes they help but usually they don't.

 

In "the good old days", my dad would dump Marvel Mystery Oil in the tank or crankcase as a fist attempt to cure his car of whatever ill behavior it was demonstrating.  If that didn't work, then the wrenches came out to see what might be the problem.  Most times the wrenching fixed the car but there were a few times when the mystery oil seemed to work, so it always was the first line of defense for a poorly running engine.

 

Terry