For some reason after i pass the 6krpm mark my car throws smoke, white smoke. and i know is not the coolant cuz it is fine. can someone tell why it does it? it is a 91 gxl

 

did you notice the flames?? lol
Looks like a air/fuel poblem.. what mods do you have & what kind of car?

 

i throw flames everything i shift in 6krpm
i have push my car on the highway in 2nd at 6krpm to see if it will stop. now i can throw flames at 7krpm. I have weapon R intake 4" cone, full custom exhaust, no cats, no a/c compressor. Suspension and that's it and my friends tell me they can smell the gas out of my exhaust.

 

Its oil. Looks like your oil seals are shot

 

how could it be if my oil is fine always

 

my car did the same thing. after i started using 93 octane fuel, it doesnt do it anymore... i dunno maybe im just dumb

 

Seems like yuor oil control seals are getting weak.. if you really want to test it.. redline it, then let off the gas while keeping it in gear.. if it starts smoking like crazy.. it going to be your oil seals.

Try using a thicker weight oil.. maybe 20-50W.. but your going to have to rebuild your motor soon.