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  1. M

    G1G2 vs G1G3

    G1G2 vs G1G3 2021 2500HD 6.6L gas. Can both of the oil ratings be used in my 6.6L gas. Very confusing.
  2. M

    Location of grease zerks 2022 Chevy 2500 HD 4X4

    I found 5 grease zerks on the front chassis, is there a chart somewhere that shows the grease zerk locations? Thanks 2022 Chevy 2500 HD 4X4
  3. M

    UPF63R AC Delco filter

    I have a 2500HD 6.6l gas engine and will be using this filter UPF63R. Do y’all have any info on this filter? It appears to be a more robust filter than the PF63. Who manufactures it?
  4. M

    Mobil 1 Truck & SUV Full Synthetic Motor Oil 5W-30

    What makes this formula better for trucks and SUV’s? Compared to Mobil 1 standard synthetic oil is it a better oil?
  5. M

    Oil for a 6.6l gas Chevy 2500HD

    Hello, I’m torn between Mobile 1 100% syn. and Castroil Edge SAE 5W-30. I’m sure they are both great oils but what is y’all’s opinion on the two. I will be pulling a travel trailer that weighs about 8000 pounds some of the time. Thanks in advance.
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