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Author Topic: Which gets better mileage? 305, or 350?  (Read 55991 times)

Offline SUX2BU99

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    • My Cardomain Site. Truck is on Page 6.
Re: Which gets better mileage? 305, or 350?
« Reply #60 on: July 29, 2008, 03:21:55 pm »
Or, you can use a diesel engine oil like Shell Rotella-T. Those oils don't have to follow the exact same standards are automotive gasoline oils and have higher levels of ZDDP. That's what I'm now using in my truck.
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85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline eventhorizon66

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Re: Which gets better mileage? 305, or 350?
« Reply #61 on: July 29, 2008, 07:41:34 pm »
All the diesel oils are losing their ZDDP additives too.  At least that's what I heard.
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'85 C10 SWB 350 700R4 TKO600

Offline Skunksmash

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Re: Which gets better mileage? 305, or 350?
« Reply #62 on: September 16, 2008, 05:11:35 am »
Quote from: eventhorizon66 on July 29, 2008, 07:41:34 pm
All the diesel oils are losing their ZDDP additives too.  At least that's what I heard.

Anyone know why?[youtube=425,350][/youtube]
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