do fuel system cleaners work or are they a bunch of BS...im talking about the ones for a few bucks aby stp or valvoline or such


thanks

 

they're crap, dont bother they'll make your maintenence costs higher in the long run...placebo effect to a certain extent

 

i read that nissan puts a stock coating on all the fuel injection parts so that all that nasty stuff doesnt stick to it.. i also heard that the additive stuff detroys that coating and while it cleans it temporarily, it will cause more problems in the long run

however.. i had 240sx with 160 k miles in it and it was bogging like crazy under 2.2k rpm. i used the techron addive as a last resort thing and it fixed it. no more low rpm boggin in any gear. so i duno.. i put half a bottle in every 6 months. it dilutes it down a bit so it wont be harmful to any part plus u get that cleaning effect that i thinki t does do.

 

didn't our beloved DBM say not to use any kind of cleaners like that and to get injectors and things like that cleaned professionaly?

 

...but at the same time two of my local shops "clean it professionaly" with exactly the same stuff that u can buy in the auto store (3M 3-part fuel system cleaner)....with 300% surcharge

 

lol..when professionals clean it they dont take apart the injectors and clean them..they use the same stuff we buy...if they took apart everythign the service to get the injectors cleaned would cost like 2k..

 

Most of those don't do much for Nissan engines since they use pintle-less type of injectors, which are resistant to clogging. BUT fuel quality and especially the oxygenated crap that is sold in CA contributes to carbon build-up so some people report a noticeable difference with the techron stuff.

 

there was an article on this, going to see if i can dig it up

 

Small mention here, but I found this reference on Popular Mechanics' website.

" Nissan no longer recommends using fuel-injector cleaners with most of its vehicles. Starting in 1991, the carmaker gradually switched over to pintleless-type injectors, which aren't as likely to get clogged from carbon and varnish as pintle-variety injectors are. Check with your dealer to see if your car or truck uses pintleless injectors before using a liquid injector cleaner. Use of such cleaners may corrode the injector coil and do no good in the process."