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  1. Geoff

    Mobil 1 FS 0w40 vs 5w40 vs 5w50 vs 15w50 in a modified LT4 in warmer climate??

    Low volatility is a concern with the direct injection and forced air. The new Dexos R Mobil 1 X2 looks right in 5w-50. I use 15w-50 on the track and will leave it in during warmer months (car not a daily driver). Someone posted good UOA with same pattern. Track oil temps are consistently...
  2. Geoff

    Can thicker oil cause more wear?

    I trust the manufacturer recommendations much more these days. With product mixes that have EVs, mainstream turbocharging success, and flattened CAFE requirements there is less pressure to meet fleet averages. Engine and oil technologies are more mature. If the engine needs a 0w-40, like some...
  3. Geoff

    Lets talk about new vehicles

    Chevy Equinox. We have a '20. I was surprised - it does everything with no fuss. Cruises at 80-85 calmly with great ride/handling. Roomy, good visibility, easy to get in/out of. The 2.0L turbo has plenty of power. AWD, heated cooled seats and moonroof. We just use it without thinking.
  4. Geoff

    2021/2022 Subaru Outback reliability

    Drive one. CVTs are just boring as it gets to me, even if they simulate shifts. The Outback is kind of a cool lifestyle car otherwise and the awd is useful on the street during snow, etc. But, there are a lot of options in that price range with AWD. Lots of crossover SUVs that have the...
  5. Geoff

    LS430 - Sludge advice

    K&N filters that are oiled can foul the MAF, yep.
  6. Geoff

    LS430 - Sludge advice

    Also recommend using OEM paper filter. The air filter massively affects contaminants in the oil. Otherwise just change the oil and filter at conservative intervals, like 2500 or 3k miles is what I would do initially for the first few rounds. The filter will filter. Transmission - is there a...
  7. Geoff

    Spotted cracks on my daughter in law’s front Dunlop tires

    My guess is the cracks were from a pothole impact with low tire pressures, maybe in the winter. Good you replaced them.
  8. Geoff

    Thin vs Thick Discussion Chapter 1

    I read this post (mostly) and I think its missing the point of Ferrari's oil recommendations. A lot of Ferrari drivers use their cars on the track. Ok maybe they drive to the track. Some Ferraris are not sold as street legal. Point is that oil is not just about flow when cold. You need...
  9. Geoff

    A Case For Not Going 10,000 Miles on an OCI

    Great debate. Do what makes economic sense. No more no less. Capitalism, I love it.
  10. Geoff

    Solid ROLLER lifter oil

    Mobil1 Turbo Diesel Truck 5w-40. Look no further.
  11. Geoff

    GM has ruined the looks of the new Corvette so bad I now like the Camaro better

    Guys this is a classic case of styling preference. Ferrari has the same problem. That is some folks like the long hood GT look and some like the purpose built mid engine exotic.
  12. Geoff

    Mobil 1 15W50, 6k mi OCI, 15.6k mi, C7 Corvette Z06

    Interesting report - thanks. I think I will use 15w-50 most of the year here in Austin. On your misfires. I think its oil in the intake. Need a catch can. Not as straightforward of an install with the LT4. I am weighing for my LT4. With my LS3 Camaro, the catch can cleaned up the pop pop...
  13. Geoff

    2018 Raptor, Best Engine Oil Decision

    Simple: HTHS 3.5 or above. Pennzoil Platinum Euro 5w-30 Dexos2 rated (Wallmart), Mobil 1 ESP 5w-30 or any other ACEA A3 oil.
  14. Geoff

    Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06

    Well I was a little concerned in colder weather but this is a good report. Changing my oil to Mobil1 15w-50 per the manual for track use in a couple weeks. Looks like I can leave it in.
  15. Geoff

    Replace coil packs with spark plugs?

    If you have short coil to plug wires, replace those. In my case with a Chevy LS3, the clip in the boot (clips onto top of plug) is extremely fragile. They break off in the boot and cause misfires.
  16. Geoff

    castrol 5w30 c3 for an LS?

    Dexos2 and/or ACEA A3 works well in my experience on/off the track with an LS3. Low SAPs nice for cleaner exhaust.
  17. Geoff

    Mobil 0w 40 FS vs 0w 40 ESP

    Pennzoil has Dexos2 oils at Walmart like Euro L 5w-30, or Amazon also has 0w-40. Looks like Dexos2 is similar to the ACEA A3 spec, with an HTHS of 3.5 or better. Better for high temps, like sustained 230F, which I see at the track all the time. I hear also has good anti foaming qualities...
  18. Geoff

    2017 Corvette / Mobil 1 5w30 / 5.6k mi

    Mobil 1 5w-30 does not cut it for track use IMO. HTHS too low. If you don't want to switch out to 15w-50 per the manual (and to keep your warranty under track use), then I would go with a Dexos2 5w-30 such as Pennzoil Euro L. Dexos2 is the recommended standard use oil in the European manual...
  19. Geoff

    US Sulfur Levels at 10ppm in 2017 (Same as EU)

    <a href="" target="_blank"></a> Tier 3 Requirement. So low- mid-SAPS oils less an issue here? (Is this old news?) EU has 10ppm sulfur limit: <a...