this post was submitted on 13 Nov 2024
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How does a turbo that intakes air get gummed up from low octane fuel? Maybe oil is the issue since turbos have oil seals. Maybe I'm missing some unknown factor on turbos.
It's not the actual turbo that gets gummed, the fuel system is what gums up, but for some reason it's far worse on the turbo versions of the cars. I could put low octane into the non turbo SAABs I had, and it didn't gum up the intake the way the turbo versions did. I don't know why.
Fuel lines degrade under lower octane perhaps. Sounds like a design flaw. I've always heard from my car auction and dealer friends that SAABs are junk through and through. I've heard it countless times. Hmm...
Nah, Americans just don't like to read the manuals, and they got a bad reputation in the late '70s and early '80s when they first put turbos into the cars, because you had to pull into the driveway, and let the turbo spin down for at least 30 seconds to a minute. If you didn't, the turbo would seize and then shred itself when you turn the car back on.
Also American mechanics don't like the fact that the engine is not in the configuration they are used to. It's rotated 90ยฐ on the z axis and 45 on the x axis. Absolutely solid tanks if you actually read the manual, and followed the routine maintenance recommendations.
Sounds like a giant pain to work on but I'm interested in doing some reading just to learn about something that can potentially contradict what I've always heard. Thanks. I'll look into this.
Once you wrap your head around the new orientation of things, it's actually really well designed to work on. I figured the mechanics just didn't want to learn anything "new"
I'm just interested in super high mileage capable vehicles. For instance my cousin has a 12v Cummins diesel and it has over 1m miles. 750k ish when he got it 10 years ago.