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  1. 2017-19 GM T-K2 Platform Powertrain
    Anyone running Rotella T6 full synthetic in there l5p or is the general consensus that these motors like Mobil delvac? And follow up question is anyone happy with conventional over synthetic or vis versa for any specific reason.
  2. General Discussion
    Hey everyone. I’m new on here. Have a 2019 2500 with the 6.6L. Have always had the dealer do routine maintenance but decided to change my oil myself this time. Used Rotella T6 5W40 (10 quarts) and a nee AC Delco oil filter. Oil pressure after the change reads about 30 psi while idling and just...
  3. 2020+ LM2 Duramax Powertrain
    So I have been lurking the boards, and seeing what owners are experencing with the engines and if this would be a good truck to go with. The 0W-20 seemed completely assanine, especially when it is only 3 approved oils- when you can find them. I follow this blog- and I asked the guy about...
  4. 911 Problems Forum
    Hello! So I’ve got a 2007 LBZ no aftermarket. Yesterday it ran beautifully but decided to change the oil since I had recently bought it. I changed the oil to rotella T4 15w40 and used a Mobil 1 filter, after changing it had a slight abnormal vibration and the oil pressure was reading 60 at...
  5. Maintenance
    My truck is a 2007 LBZ. I ad changed my oil to shells rotella 15w40 T4 and used a Mobil 1 filter. After doing so my oil pressure shot up to 60 psi at idle and it was previously at 25ish, threw me off. I had realized the truck seemed off with abnormal vibrations and such so I let it go for a...
  6. 2020+ GM T1 Platform Powertrain
    It’s a challenge to dump oil from a 2.5 gallon jug into my 2020 L5P using an 8 inch funnel without spilling over, and with the filler so close to the firewall there’s not a lot of clearance under the hood for the large jug. Maybe smaller jugs or a different funnel would work better. What are you...
  7. Alternative Fuels Diesel Additives Lubricants
    I've been told by the dealer that engine oil (and filter) need to be changed every 3,000 miles religiously. According to the oil life on the display, that is not the case. I have an '06 LBZ spinning an Allison, and I rarely get the chance to work the truck the way it's set up to be worked. Is it...
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