High mileage car and seafoam

[R32_TDOT]

my beater/dd 1995 toyota avalon has 256,000 kms on it. oil change was done around 4000 kms ago and the oil still looks good ( full synthetic) , i recently googled seafoam since i saw it here and apparently it cleans up the inside of the engine.. should i use seafoam since my engine has 256k on it ?

[falcon]

no.

the seafoam will clean all your carbon deposits out... in some cases, all that is sealing the rings is carbon. if the car runs fine, then just leave it.

[R32_TDOT]

so what can i do to keep the engine and tranny in good shape besides swap the fluids when i have to? (and not abuse it ) those "fuel system cleaners. are they any good or just stick to what ive been doing the past 4 years on it

[Shadao]

so what can i do to keep the engine and tranny in good shape besides swap the fluids when i have to? (and not abuse it ) those "fuel system cleaners. are they any good or just stick to what ive been doing the past 4 years on it

if it aint broke dont fix it...

obiously what you are doing is working just fine...

1-2 times per year i will use the fuel system cleaners but thats it... once in spring and once just before winter...

if they work good if they dont i havent noticed any change in my DD

[TK-GTS]

i have used seafoam many times on different cars and always had good results. i say do it but make sure u change ur oil after 100km. seafoam isnt ment to fix anything its to prolong the life of your engine.

[Skym]

I've used a carbon clean machine on my cars RB engine. It cleans injectors, cylinders, etc.

[R32_TDOT]

actually what i learned way back is to put in premium every now and then and wot on the engine , since its premium it burns better. btw how can i tell if its running rich?? my exhaust smells like gas a little bit. im thinking i shud clean out the o2 sensor??

[Skym]

Exhaust can smell of rotten eggs when o2 sensor is faulty and fuel economy is bad. Also the o2 sensor voltage slowly fluctuates and wants to sit on 14.7:1 most of the time at idle. At least that's what I noticed on my car.

Can't clean o2 sensor, you just replace it with a new o2 sensor every 60,000 kms. Change o2 sensor earlier if car has sat around for while (months) or have mostly done short trips.

[EtienneGignac]

...since its premium it burns better.

No it doesn't.