So has any Series 2 done Seafoam yet?
 

I posted a topic about this awhile ago and it seems like nobody had done it at the time. I know that the nipples you use on the s1 are not there and I believe replaced by two hoses that connect at a T junction and go somewhere else. Do I just remove 1 hose at a time and follow the regular seafoam DIY for s1's?


Just wanting to make sure before I go and attempt something that might not be right.

I have not seafoamed my r3 but I only got 5000kms on it haha

I got 30k on mine so I think its about time. Hopefully someone has done it so I can do it correctly to mine.

I don't think there is a difference between the two series.

I'm pretty sure the SII has the same nipples on the LIM that you can hook the seafoam can into.

EDIT:
Ok I found your other post: https://www.rx8club.com/series-ii-technical-trouble-shooting-160/seafoam-2009-a-202312/

Looks like the last post suggests a alternate tube that runs from the oil filler area:

Quoted from jasonrxeight:
I believe the S2 has a tube on the filler neck that splits into two hoses that go down to the lower intake manifold, you can try that one. should be the top hose on the filler neck. the lower one some how goes to the intake tube which is why if you over fill the engine oil, you still can have oil in the intake tube.

Have you had a look at this?

EDIT 2:
Post this in the Dumb Question no flaming thread
https://www.rx8club.com/rx-8-discussion-3/dumb-question-thread-no-flaming-sarcasm-allowed-208221/page25/

Yes I have looked into that, "I know that the nipples you use on the s1 are not there and I believe replaced by two hoses that connect at a T junction and go somewhere else." from my post above.

I just want to make sure thats still the proper spot even with the hoses going to other places. I am fine just waiting it out in this section, probably get a better response in the proper section.

Running some in your gas tank to keep the fuel system clean is one thing, decarbing a Renesis with it is a waste of money though, but there is no shortage of people here who keep thinking it matters even though it doesn't ....

Doesn't mazda use their zoom cleaner on a car after it fails a compression test to see if they can get some more compression out of it before they give you a new motor? People have posted having it fail the test then be higher compression on the 2nd one mazda did after the cleaner.

Why do you think you need to decarbonize your car? Is it failing a compression test?

I also have a 2009 sport automatic with 31,000 miles on it. Just normal maintenance, 5w30 in winter and 10w40 in summer, premix 4 oz Idemitsu per tank, open it up and redline about every 2 days, paddle-shift otherwise. Car runs like brand new and averages 24 mpg. I'm not gonna mess with that by SeaFoaming based on some hunch...

I don't see how doing preventative stuff is a "hunch". When was the last time you did a compression test pete, and what were the numbers? I know mine are at 96/97/98 at 260 rpm for the front rotor and I want to see if it makes a difference with seafoaming it. They are not bad numbers by any means, but if it can get better for $8 why not try? In most of my other cars I generally seafoamed every 20k miles.

Why wait til there is possibly a big build up to attempt to clean it out. It would seem smarter to me to try to clean it while there is most likely less carbon/crap in there.


I don't know how you get 24 mpg average but maybe its because you redline your car only a few times a week and your redline is also less than a MT.

It's a "hunch" when you are attempting to use SeaFoam as a preventative of some possible future issue, rather than in direct response to a demonstrated compression problem.

I've never done a compression test on my car because:
-I've owned it since new and done all the driving and maintenance myself
-It starts and performs like new, hot or cold. It can't run any better than it does.
-Its fuel mileage normally equals or exceeds the published EPA test results
-It has never been flooded, overheated, neglected, or abused in any way
-The car is only 2 years old and 31,000 miles.

Compression tests are usually done in response to poor starting/running quality or perceived performance problems. My car has none, so why would I waste time / effort / money to perform unwarranted tests on a flawlessly running car when there are many other projects in the garage waiting for my attention? For those who enjoy tinkering and have no other distractions, go for it and have fun.

I average 24 mpg because:
-I drive about 75% freeway for my daily commute, more on the weekends.
-I use the car for commuting and weekend trips out of town, not street racing or "driving like I stole it".
-I keep all required maintenance current
-It is an automatic, which has much higher ratios in the top gears than the manual transmission models, resulting in better fuel consumption

And please don't lecture about redlining. Anyone who has read these forums realizes that the side port design has more carbon clearing issues than the periferal port design, and it benefits from occasional agressive operation to minimize build-up and optimize performance, reliability and longevity. I do this when conditions permit. However, nobody can say for certain that a minimum of X redlines at X load every X miles will give a Renesis a lifetime of X miles. That would also be a hunch.

I bought my car with 18k miles on it, so for all I know the person before me drove it like a grandma and did not care for it 100% properly. In the 11k miles I have owned it I have done everything it needs topping oil off, changing oil/filter at 3k, redline when I can, a few small mods to the engine bay, recently started premixing, etc.

Compression test cost me less than a gallon of gas to drive to someones house and about an hour, 45 minutes of that was talking to someone, not exactly breaking the bank. Considering it is about 16ish psi under what a brand new engine is billed at that tells me something could have been wrong with its care before I got it. I would like to know if doing seafoam can raise it, nothing wrong with a little experimenting. It is also a good plan to check on the motor every now and then, just to see if its in good shape. I have never drove another rx8 so I could not say for sure what was "good" or "bad".


Not once in my post did I lecture about redlining. I just said since you only do it a few times a week and I do it more and at a higher rpm that might explain the MPG difference we are seeing.


All I was asking was a simple question about if anyone has done this to an s2 yet, if you have please tell me so. If you have not and don't know exactly what to do then I really don't see why your complaining about someone else doing it.

Any new happenings in this area? I've got an APV stuck open code and I'd like to try decarbing in hopes that I won't have to take things off and get in there to fix it. Also bought the car at 30k miles and god knows what the guy did to this poor car before I got a hold of it.

I put Seafoam in my engine in 2 successive fuel fill-ups.

She seems to go much better now and I'm getting a compression test in the next week or 2 to compare against my results from before.

Be sure to post your results please.

Would love to see if any improvement.

ive been misfiring myself the last two weeks. I put half a can into the oil and the other half in the gas. That alone i noticed a difference. Still misfiring, but i assume its other things. Im going to try another can into the vacuum lines by weeks end. Ill let you know how that goes.

Careful putting it in the oil. I put it in my oil on an old car I had without fully reading and understanding and developed an engine ticking sound not long after. That was a piston engine though. I would change your oil pretty soon after putting it in there. I think 50-100 miles is what is suggested.

You are supposed to put in about 1 1/2 ounces per quart of oil so a little over half a can, if you choose to do so. Just remember that since we have oil coolers you will pretty much never get all of that seafoam out of the engine. When you change the oil you might get about 5 quarts out if you are lucky and are left with about 2 quarts of old oil in there. It will take a long time and many many oil changes to get it all out.