Recent content by Marky Dissod

  1. M

    Look At What Came Out Of My Catch Can

    Why would you want to return that off-white stuff in this pic to the crankcase? Don't forget to click on the pic to get a good look at the mung under the 'soy sauce'. There's a reason why Mercedes stopped doing it - probably heat cycling. Makes me wonder where the catch can actually belongs...
  2. M

    E85 or regular gas?

    I stand corrected.
  3. M

    Valvoline Restore & Protect experiment

    Cadillac's V8-6-4 shut off the fuel but did not shut off the valves (nevermind that V6 mode was its own rumble factory), which made the power loss and vibrations so blatantly obvious to the driver, that the feature got disabled before it could cause any serious costly damage. With Engine...
  4. M

    Valvoline Restore & Protect experiment

    Pretty much this - then GM doubled down by adding V7 V6 V5 V4 V3 V2 and I2 modes to their V8s ... (My suspicion is that their intent was to make their engines more likely to fail at around 200,000 miles.) Between 30,000 & 60,000 miles, Engine Half@$$' MpG benefits over V8 mode evaporate...
  5. M

    6.2L - Debris Found in Engine Oil

    GM tests your sanity by saying '1qt per 1000 miles is normal' with a straight face, just to see if you'll fall for it. Next time, try 4500 miles, see if the oil consumption goes down. Find out which (Group4 synthetic) motor oil is spec-compatible with the 6.6L L8T, use that instead of 0W20. Bet...
  6. M

    For anyone wondering about tire clearance…

    Just 'cause I can't see them doesn't mean they aren't there ... but where are the brakes?
  7. M

    Valvoline Restore & Protect experiment

    Years ago, I INCREASED the V4 mode duty cycle on a 2012 Yukon XL I was leasing for NYC livery driving. Point was to be in V4 mode as much as possible driving in Manhattan. It was a mistake. MpG gains were barely detectable between the first and second years. I left it alone to try to encourage...
  8. M

    Oil's shelf life...

    If you've never seen sediments on the bottom of a bottle / can (yes I said 'can'!) of motor oil ... I did, back in my early 20s. Since then, I avoid any motor oil that is over 1 year old.
  9. M

    Why PPV / SSV vs civilian released models

    Caprice PPV might've actually been too good a car for police work, but it was definitely too pricey for cheap gov't bastaduccis who refuse to appreciate that you get what you pay for. Now that the Caprice PPV is dead, I get that part of the reason why GM only offers a 5.3L, is because Gen5 V8s...
  10. M

    Newbie to stock Tahoe and ppv

    Always thought that the 4WD PPVs had no Lo range, that Lo range was only for SSVs. In any case, very much doubt I'll ever own a GMTK2 PPV; think I'd be very happy with a GMT900 SSV.
  11. M

    Why PPV / SSV vs civilian released models

    Horseschidt. Even given that town / province / voivod / county / city / state budgets are a thing, if GM could afford the L77 in the Chevy Caprice by Holden, they can afford a 6.0L in anything. Maybe there's some sort of under-the-table thing going on with Ford? 'cause the Ford PIU with 10L80 is...
  12. M

    4l60E Compatibility

    You're right of course, but my point is the 4T60E family has nothing to do with the 4L60E family (except that they're 4 speeds), so he should ignore front wheel drive entirely. strutaeng summed it all up with a bow for you. Don't waste your time with anything else.
  13. M

    Newbie to stock Tahoe and ppv

    Check out this 2019 PPV & SSV brochure (publication date May 4th 2018) https://gmauthority.com/blog/wp-content/uploads/2018/05/2019-Chevrolet-Tahoe-order-guide-PPV-and-SSV-order-guide-May-4-2018.pdf Looks like a RWD PPV (3.08), a 4WD PPV (3.08), and a 4WD SSV (3.42) were available. Also note...
  14. M

    Look At What Came Out Of My Catch Can

    The chemical difference between crankcase motor oil and what's in the catch can is why catch cans exist. Otherwise, why not just pour what's in the catch can back into the crankcase? DON'T DO THAT.
  15. M

    4:10 vs 3:73

    3.73:1 axle ... 265/70R17 tires are 31.60" tall ... 4L60E's 4th gear = 1800RpM @ 65MpH, 2000RpM @ 72MpH, 2200RpM @ 79MpH 4.10:1 axle ... you want tires 34.7" tall to avoid reprogramming the speedometer altogether. Tires shorter than 34.7" tall will make the speedo read faster than actual with...
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