I've been wanting to do an engine flush on my 88 before switching over to amsoil. I assume this would be of great benefeit to the engine, but I was told that doing this could have some cons. Any opinions?

Also, I'm debating which amsoil line to go with. Any recommendations?

 

The best engine flush, is probably the seafoam. Great reviews for it.

 

The only con I've ever heard of when doing an engine flush is if your engine has a substantial amount of oil sludge buildup, flushing it could break that all loose too quickly and it could stop up oil passages and get into the bearings and basically do more damage than good. Also, some oil flushers are a large part kerosene, which is safe to go in the crankcase, but can eat up seals if its not cleaned all the way out.

Honestly, if the engine had regular oil changes (between 3-5k miles for conventional, don't know about synthetic) with a quality oil, there should be no reason to flush it. If it hasn't been maintained, the best thing to do is over the next several changes, put in seafoam and run the engine for 10-15 minutes before changing it. It's always best to clean it out slow.

 

mine has 170k on it and im not positive it has been well maintained i know it has for the past 2-3 years i have had it but that is about all i do know for sure. and i was thinking bout doin an engine flush but im kinda scared to be honest.......same thing with transmission and coolant flushes

 

is amasol synthetic? i put seamfoam through and had no problems. i did spray cold water through the throttlebody first to loosen the carbon. if you got big time carbon i can see a problem, but if it's normal you should be ok.
i found with synthetic oil there is not much sludge build up.

 

What you said about the sludge is pretty much the concern I had. I will follow you're advice and run it through a little at a time before the next few oil changes. I'll try gettin hold of the seafoam flush. I don't know how well the po kept up with the changes, I can only assume it needs as much love as it can get.

MAZDA - yes it is synthetic. I have done alot of research of various brands before deciding and amsoil seems to be the best option (based on the testing that has been done against most brands.)

 

Yup, everything they make is synthetic. The only thing I don't like about amsoil is nobody local seems to sell it (that I've seen).

+1 to spraying a mist of water in the intake to loosen up carbon (basically steam cleans the combustion chamber), but spray HOT water in!!!!! If that cold water hits a hot head, it could crack it. Same thing for filling up a radiator, never put cold water in the radiator of a hot, running engine!

 

my mistake slt. it was room temp water. your right about the cold water. don't remember where i read to do that (might of been here a long time ago) or it might be on the directions on the can, that was a couple of years back.

 

*I'll be running some regane in the fuel system aswell