Best oil for cummins isx

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Vivaspin, Nov 15, 2020.

  1. truckdriver31

    truckdriver31 Road Train Member

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    then why lucas
     
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  3. Ol'Shusquatch

    Ol'Shusquatch Light Load Member

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    Have used Rotella for a long time with no problems. If you are hung up on Lucas cut to a half ration.
    Not a great believer in the need for additives. Do believe in changes being done on time. Fuel and oil cleanliness is next to godliness. JMO
     
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  4. I glide 47

    I glide 47 Road Train Member

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    I use Lucas when I have a fuel delusion problem just to get to the shop
     
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  5. I glide 47

    I glide 47 Road Train Member

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    Also on a very high mileage engine that maybe uses lots of oil,
     
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  6. CropShop

    CropShop Bobtail Member

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    So does Lucas actually stick to the bearings and all inside the engine? I never tore an engine apart, after using Lucas but I did have Lucas Hub Oil in a trailer hub with a bad seal, and the bearing was still sticky after the oil was gone. Can see why that might not always be the best in an engine though.
     
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  7. pavrom

    pavrom Road Train Member

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    My mechanic puts mobil delvac in my trucks , the guy who rebuilt my engines prefers delo ...read here on the forum from several guys pointing that shell is no good anymore ..like it was 20 years ago
     
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  8. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    I use a synthetic blend 15-40 from a local oil distributor. Also, I throw in a gallon of Wally World 85-90 gear oil, GL 5 per RAWZE. C o m. He’s the ISX’s guru. Check out he’s site.
     
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  9. AModelCat

    AModelCat Road Train Member

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    I tried Lucas in my pickup. I noticed it made some minor rattling noises. Dumped the oil and filled with oil like normal. No problems. Probably too thick to properly flow.

    I don't understand everyone's obsession with having high oil pressure. Pressure is resistance to flow. Higher pressure = more resistance to flow. I'd rather have the flow if the pressure is in spec.
     
  10. Ol'Shusquatch

    Ol'Shusquatch Light Load Member

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    Right, adequate flow of oil with oil temp not excessive and again changes at no more than recommended intervals.
     
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  11. AModelCat

    AModelCat Road Train Member

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    Unless they want a 50k mile oil change interval.
     
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