Here is a comment for the anti chlorinated oil crowd:
http://www.mpc-home.com/htmls/Chlorine and Engine Oils.htm
I have several customers that have use nothing but an occasional bottle of OTC fuel injector cleaner straight from the local autoparts or department stores.
This means that ALL the fluids aren't tampered with ever. No ATF/oil/PS/antifreeze/per-fillup additives are used. No issues have ever developed even though some of these cars have 200k+ miles. But, normal maintenance intervals are being used even if it wastes resources. No 25k ATF or 10k oil extended fluid changes ever.
Stick with name brand products, busy stores, and spend your money on more worthwhile entertainment.
Or, pick and choose the additive that gives you the most psychological improvement in vehicle performance.
Currently running Lubegard in the transmission. Some transmissions respond well to it.
For the FI cleaner, its a toss up. Seafoam, B12, Chevron, Redline, Lucas, BG......along with others, are pretty good.
For the engine, I have never had a seal issue with quick flushes. And, as a guinea pig, ran a quart of engine flush on a hot engine for a 30+minute ride from the autoparts store. This engine had over 200k miles on the original seals. This engine runs better now than ever and doesn't leak. As you can see, even if you're ignorant with the flush directions, you shouldn't create problems. Maybe a problem will develope if you boil the seals in straight engine flush for a couple of week.
Recentyly added a bottle of Rislone to a 100k mile poorly maintained 350V8 pickup. Within 1k miles, oil consumption has dropped, engine MPG has increased, and engine makes less ticking/tapping and other weird noises.
And, theres Marvel. It has been added to used car purchases for friends and family(if Rislone wasn't available). It too had an affect similar to Rislone.
And my next candidate is currently running Rotella T 5w40 diesel oil in a gasoline engine. After 3k miles, the carbon buildup in the corners of the oil filter mount is gone. This was a surprise since the engine has had a diet of OTC synthetics. The oil was also very dark compared to previous changes. Maybe a diet of HDEO oil is the be$t method for those used car purchases....
I also have a friend who claims that his recent water injection system has improved car's performance. Good ol' mist of water making improvements. Wonder why the OEM isn't using H20 along with a knock sensor instead of timing retard?
