The Fred
Veteran Member
Yes for sure, worst offenders I see are those driven with light throttle pressure. Those driving for economy if you will, Fred
Decarbonizing GDI Engines....
- Thread starter 3930dave
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Yes for sure, worst offenders I see are those driven with light throttle pressure. Those driving for economy if you will, Fred
LOL. (I believe you).
Pretty ironic, considering we are (allegedly) supposed to be Saving the Planet with these latest/greatest designs.....
Rgds, D.
southerniltractor
Silver Member
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- Caryle, IL
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- Kioti DK40se HST with FEL, Simplicity Landlord, JD130
D,
You are correct. I change oil/filter every 4000 to 5000 miles while the book calls for a 7500 mile oil change interval. We rarely drive in town and most of our driving is long distance (for city folks). Hyundai does call for a jug of "fuel additive" every 7500 miles, but I've never followed this guidance. After reading this thread, perhaps I'll start doing that!
Thanks,
Mike
You are correct. I change oil/filter every 4000 to 5000 miles while the book calls for a 7500 mile oil change interval. We rarely drive in town and most of our driving is long distance (for city folks). Hyundai does call for a jug of "fuel additive" every 7500 miles, but I've never followed this guidance. After reading this thread, perhaps I'll start doing that!
Thanks,
Mike
^Good oil change practices, and little/nothing for short-cycle cold weather driving. Doesn't get much better than that.
Injector geometry has gone down, rail pressure up. Add to that many light-vehicle manufacturers have done away with under-car/hood replaceable fuel filters (gas engines)....... net/net, while using a good quality injector cleaner at reasonable intervals was never a bad thing, it has become more critical on modern GDIs....
Rgds, D.
It's interesting that you can tell a car has GDI when they merge on the hwy. They blast out a big puff of carbon just like an old timey muscle car.
Respectfully I would disagree with the premise that it is reversion that is causing the deposits. The valves most heavily affected are those downstream of the PVC port.
Respectfully I would disagree with the premise that it is reversion that is causing the deposits. The valves most heavily affected are those downstream of the PVC port.
- Joined
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- 26,957
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- SE Michigan in the middle of nowhere
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- Kubota M9000 HDCC3 M9000 HDC
Don't get behind me with my 7.3 IDI Powerstroke. it's chipped and Banksed... I guarantee you you'll have 'black lung' if you are behind me when I tromp it.:laughing:
wawajake
Veteran Member
I want to thank all the mechanics on this long but interesting thread....I now understand much better why when I borrow my wife's 2012 Elantra and step on it on highway merge, I have at times got huge black smoke result.......scares the crapp out of me and the drivers beside me. She drives much more sedately however we are fortunate that our drive into work each day is a 25 minute drive at highway speeds. But with 80,000 miles (130,000 kms ) on it I was getting worried about that four cylinder and that random black smoke. We use good oil (synthetic in winter) and have lately learned you must use Hyundai's oil filters as per a TSB they issued about valve train noise. Too late that engine already doing the tell tale clackity clack!.........Also have a 5.3 litre 2014 GMC truck so read with interest the modifications some made.............thanks
Snobdds
Elite Member
It's been a while since I posted in this thread, but I would not worry about deposits in the 3.5 ecoboost. Just for fun I ran a bore scope into the cylinder of my truck with 16,000 miles on it when doing spark plugs and did not see any carbon or sludge. I'm not worried about it.
Yeah, that was my point too. I wouldn't try to clean anything when 1) it isn't needed, and 2) you could cause damage.
