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3.0L Duramax Turbo Diesel
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<blockquote data-quote="SDMF" data-source="post: 382050" data-attributes="member: 412"><p>The above is correct. </p><p></p><p>If its cold (0F or below) or is forecast to be soon, I just go straight to #1 with an additive to gain back some lubricity for the pump. I'll give up some power and mileage w/#1 for the security of reliability. I'm over 220K Mi on mine and it doesn't even hiccup @ the cold. I replace the batteries every 4yrs no matter what they show. I run Syn oil too. I suspect your 3.0L 'Max probably requires syn oil anyway.</p><p></p><p>I know when it's been well below zero I've gotten a "Wait to Start" countdown message on my dash. Never so much as a hiccup once the countdown finishes.</p><p></p><p>The one time in ~300K Mi of driving diesel pickups I gelled mine up, it was 100% my fault for getting caught by the weather with the wrong fuel. I'd gotten home on a Sunday, didn't check the weather for the following week and got caught w/a tank full of untreated #2 in -20F ambient temps.</p></blockquote><p></p>
[QUOTE="SDMF, post: 382050, member: 412"] The above is correct. If its cold (0F or below) or is forecast to be soon, I just go straight to #1 with an additive to gain back some lubricity for the pump. I'll give up some power and mileage w/#1 for the security of reliability. I'm over 220K Mi on mine and it doesn't even hiccup @ the cold. I replace the batteries every 4yrs no matter what they show. I run Syn oil too. I suspect your 3.0L 'Max probably requires syn oil anyway. I know when it's been well below zero I've gotten a "Wait to Start" countdown message on my dash. Never so much as a hiccup once the countdown finishes. The one time in ~300K Mi of driving diesel pickups I gelled mine up, it was 100% my fault for getting caught by the weather with the wrong fuel. I'd gotten home on a Sunday, didn't check the weather for the following week and got caught w/a tank full of untreated #2 in -20F ambient temps. [/QUOTE]
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