08-24-2023, 12:51 PM | #265 |
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08-24-2023, 12:56 PM | #266 |
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Since this is an ethanol treatment, it will not extend the OCI or plug life will it?
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08-24-2023, 12:57 PM | #267 | |
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Top tier gas has nothing to do with fuel solution nor will it prevent IVD. Choice of oil and the PCV have an impact.
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08-24-2023, 01:03 PM | #268 | |
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08-24-2023, 01:05 PM | #269 |
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While there is not a vapor collection system, the valve covers do have baffles leading to the hoses that go to the turbo inlet pipes. The baffles supposedly do a pretty good job trapping oil. My 08 535xi had DI but a different vent system with PCV valves and the amount of goo in the intake ports at 90k miles was surprising — they were about 1/4 blocked. It looks like it would be an engine out job to clean the intake ports on an F90.
I have been running water/meth injection for a couple of years on my F90. It goes through the intake manifolds and supposedly helps reduce carbon build up. |
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08-24-2023, 02:43 PM | #270 |
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I for all that matters will not fuel at shell or BP and use other top tier fuel stations. Even at 30-40c per gallon I’d rather save it and have a good whisky for those savings rather than give it away for the one of the most taxed product sold in the states. It’s not money thing. It’s ideological
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08-24-2023, 02:52 PM | #271 |
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No, it is just fuel system maintenance.
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08-24-2023, 03:11 PM | #272 | |
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08-24-2023, 03:26 PM | #273 |
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As Shawn pointed out, some car makers are now adding port injection to DI systems to reduce carbon buildup.
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08-24-2023, 04:11 PM | #274 | |
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Your proposal that choice of oil is relevant while ignoring that significant gasoline contamination occurs frequently but top tier gas has "nothing to do with fuel solution" seems nonsensical to me. And NOTHING can prevent intake valve deposits. They can be minimized, but not prevented. Shawn |
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08-25-2023, 07:03 AM | #275 | |
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As for my oil comment. All else being equal using high SAPS oils (LL01, LL01fe) can result in more IVD compared to Low SAPs (LL04, LL17fe). The 20w oil used by BMW in the US is low SAPS (ACEA C5) but that wasn't always the case with previous gen TGDI engines.
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08-25-2023, 10:01 PM | #276 | |
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As far as SAPS go, now you're talking. High quality uniform carbon chain oil can be less volatile and not end up as oil vapor burning on valve stems. But that's not the ONLY cause of deposits. It has to be more complex than that. Shawn |
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08-26-2023, 02:05 PM | #277 |
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Lol all this ... The DI flaw in design is those dry valves. Ok, but the trade off is better combustion and power. I've considered Meth as a relief to keep those valves wet(ish) and possibly extend maintenance life. Also, I only see one mention of anyone using system or Injector cleaning agents separately. Interesting... Lol too about those penny pinching gas prices while driving a sports car. I'm sure they're not going to drop a $12 can of fuel system therapy in a tank, or every other tank, or every oil change (2-3000 miles). Lol
All of this, remember the RULES! You gotta PAY to Play! PICK YOUR POISON... CHEAP/FAST/RELIABLE Fast isn't cheap, nor reliable... Reliable isn't cheap or fast... Cheap isn't fast or reliable... If you're cheap, you get the worst deal! If you spend on fast, you can affect reliability, to an extent. You want it to work forever, well that's just boring! Lol Good Luck! |
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08-26-2023, 11:43 PM | #278 |
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Use tier 1 gasoline and if only DI, walnut blast intake valves every 30K miles, no big deal. Italian tune ups whenever possible.
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