The new Honda Accord has gone to DI. Should these motors be given a special type additive in the fuel? If so, what kind?
What additive for Direct InjectionI engines?
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JHZR2
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I generally run redline SI-1 in my 135i. But I have also used TCW-3 for other reasons (UCL).
Supposedly the redline can survive combustion to some extent and come back through the PCV.
That said, I just bought a catch can...
Supposedly the redline can survive combustion to some extent and come back through the PCV.
That said, I just bought a catch can...
MMO
Originally Posted By: morris
MMO
MMO doesn't really do much for fuel dilution, which I understand to be the main issue with DI. Also, OP was asking about a fuel additive, not an oil additive (perhaps this thread needs to be moved?) and MMO is a bad idea in gas if you value your catalytic converter, according to some.
MMO
MMO doesn't really do much for fuel dilution, which I understand to be the main issue with DI. Also, OP was asking about a fuel additive, not an oil additive (perhaps this thread needs to be moved?) and MMO is a bad idea in gas if you value your catalytic converter, according to some.
If you are trying to reduce intake valve deposits andything added to the fuel will not help as the fuel is injected directly to the combustion chamber not via the intake valve. The only remedy I could see for troublesome intake deposits would be the addition of a catch can. I would assume a catch can would not be favorable for warranty purposes though.
How about none, thousands of other cars run fine without it. All gas contains plenty of additives and you don't need it.
If you wanna feel good though add anything. Most of it is just a placebo.
If you wanna feel good though add anything. Most of it is just a placebo.
A $7 entire fuel system cleaner containing the additive PEA the last tank of every other oil change/15k should be all you need. Sold at Walmart containing PEA - Techron concentrate plus, Gumout all-In-One.
I think MMO via an Inverse Oiler, and a catch can would help.
I use Redline SI-1 once per OCI. My car is an FSI (Audi's name for DI). Redline does contain an upper cylinder lube (UCL), something other additives don't. Frankly I don't think the SI-1 is even necessary, but for $9/year it gives me some peace-of-mind.
If you're not running [censored] gas in every tank, these additives probably aren't necessary.
If you're not running [censored] gas in every tank, these additives probably aren't necessary.
Had a guy come in yesterday and bought 2 bottles of SI-1, he said he was told by the Ford Dealer that he needs to run Techron or Redline to offset the negatives of DI. He has to add this at least every other gas fill up.
That dealer needs to be enlightened!
That dealer needs to be enlightened!
Originally Posted By: EricF
Had a guy come in yesterday and bought 2 bottles of SI-1, he said he was told by the Ford Dealer that he needs to run Techron or Redline to offset the negatives of DI. He has to add this at least every other gas fill up.
That dealer needs to be enlightened!
Does that mean Ford is having problems with DI, or is the dealer clueless?
Had a guy come in yesterday and bought 2 bottles of SI-1, he said he was told by the Ford Dealer that he needs to run Techron or Redline to offset the negatives of DI. He has to add this at least every other gas fill up.
That dealer needs to be enlightened!
Does that mean Ford is having problems with DI, or is the dealer clueless?
You really think a dealer said "you need to buy this" and wasn't clueless? Where in the Ford manual does it say you need it?
Nowhere.
Nowhere.
I think that means the dealer is clueless. In fact, Ford likely makes a fuel additive. Most manufacturers do.
Okay, granted, but probably not all the time arbitrarily. MOPAR suggests an additive for my car in a TSB and later manuals, essentially the equivalent of "if you have hesitation, try injector cleaner first".
Thanks folks for the feedback. Perhaps I should have asked not just what additive, but is one needed. I don't normally use an additive unless theres a specific issue. With the newness, to me anyway, of DI, I wasn't sure whether some additive was advisable. As much as possible I try to use Shell, BP, Hess gas, but the QM's in my area often have lower prices.
Originally Posted By: RiceCake
You really think a dealer said "you need to buy this" and wasn't clueless? Where in the Ford manual does it say you need it?
Nowhere.
It was stated he needed to add a cleaner every other fill up. That's what triggered my comment. I was thinking either Ford has a problem with DI, or the dealer has no clue. I don't see many people complaining about the Fords with DI yet.
You really think a dealer said "you need to buy this" and wasn't clueless? Where in the Ford manual does it say you need it?
Nowhere.
It was stated he needed to add a cleaner every other fill up. That's what triggered my comment. I was thinking either Ford has a problem with DI, or the dealer has no clue. I don't see many people complaining about the Fords with DI yet.
Hyundai says to use it (techron) if you use non top tier detergent gas before every oil change. I do it anyway - can't hurt.
I've used a maintenance dose of SI-1 or standard dosing of FP Plus in all of my DI cars so far. The FSI GTI that I previously had and my current N18 engined Mini S are both super picky about fuel quality, and seem to run noticeably better on a broader range of fuel (ie. anything not from Shell) when additized. Both cars are tuned though (K04 and software on the GTI and JCW kit on the Mini), and require premium, so that may contribute to the finicky nature of them.
My wife's Mazda has a direct injected motor, and doesn't care at all what fuel we put in it or exhibit any noticeable benefits from using additives, so she just gets a shock dose of FP Plus every now and then.
--Matt
My wife's Mazda has a direct injected motor, and doesn't care at all what fuel we put in it or exhibit any noticeable benefits from using additives, so she just gets a shock dose of FP Plus every now and then.
--Matt
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I would not use MMO. My skyactiv does NOT like it at all. I have run two rounds of testing so far with MMO.
My average with no additives is 40.8 MPGs.
First round was 4oz/10 gal. Lost about 1.5 MPGs over 2 tanks. MPGs were measured on specific round trips and averaged over two tanks to eliminate irregular trips. High and low values were thrown out before taking average.
Round two was 3oz/10 gal. Only lost about 0.9 to 1.0 MPGs over two tanks at this usage level.
I have not been able to confidently measure an MPG decrease due to MMO other vehicles I have used it in, but I haven't been able to measure an increase in any of my test vehicles (all 4-bangers).
If it cleans the combustion chamber, which it very well might based on other evidence we have seen, the question will be is that worth the loss of MPGs? You could still keep the chamber clean using other additives like Gumout, Redline, etc.
My average with no additives is 40.8 MPGs.
First round was 4oz/10 gal. Lost about 1.5 MPGs over 2 tanks. MPGs were measured on specific round trips and averaged over two tanks to eliminate irregular trips. High and low values were thrown out before taking average.
Round two was 3oz/10 gal. Only lost about 0.9 to 1.0 MPGs over two tanks at this usage level.
I have not been able to confidently measure an MPG decrease due to MMO other vehicles I have used it in, but I haven't been able to measure an increase in any of my test vehicles (all 4-bangers).
If it cleans the combustion chamber, which it very well might based on other evidence we have seen, the question will be is that worth the loss of MPGs? You could still keep the chamber clean using other additives like Gumout, Redline, etc.
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