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Old 05-13-2017, 06:46 PM   #21 (permalink)
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little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
Last 3: 24.65 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
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Are you goig to do a bench run ,with frozen oil to verify that the increased viscosity will not have an insulating effect?

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1st gen cummins 91.5 dodge d250 ,16cm turbo housing ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16



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Old 05-13-2017, 07:03 PM   #22 (permalink)
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The oil would have to be so cold it would need to be like honey or maybe even thicker. You would have to use real thick oil when it's really cold out to have to worry about that.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
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Old 05-14-2017, 01:54 AM   #23 (permalink)
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Location: Butte, Montana
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little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
Last 3: 24.65 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 22.62 mpg (US)
Thanks: 155
Thanked 244 Times in 167 Posts
Viscosity of 15w40 6400 cP @Temperature -4.00 F
ChevronTexaco RPM SAE 15W-40 Heavy Duty Motor Oil
Viscosity of honey. aproxamitly 1800cP @ + 40f
I do see -40f in Montana. seen sub 0 in CA, OR, NV, WA ID,AND KS ,the many missing from list are those I have not lived in and had personal experience. Every state I have lived in so far this is a valid concern. At -4 oil is aproxamitly 4X thicker than honey kept in the fridge.
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1st gen cummins 91.5 dodge d250 ,16cm turbo housing ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16



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Old 05-14-2017, 12:36 PM   #24 (permalink)
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Join Date: Jul 2011
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Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)
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About the only time I use 15w-40 is during the summer before a road trip.
Other wise I will run 5w-40 and I keep some 0w-20 to top off the oil when it gets real cold.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
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Old 10-25-2017, 10:55 PM   #25 (permalink)
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Join Date: Dec 2014
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little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
Last 3: 24.65 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 22.62 mpg (US)
Thanks: 155
Thanked 244 Times in 167 Posts
My stock oil cooler wet the bed ... blew 2.5 ga of oil into the coolent. Ugg.. well got a chance to studdy the passages. Flow is : oil pump , heat exchanger , oil filter , turbo/block. Sence I've mesured at many different operating temps from 100f - 185f at all points the IR temp gun said oil and water are a dead match with the digital coolent temp gauge,however the block was considerably cooler then oil or water.

This is making me reconsider the probe placement(was going to put it in the filter head) of my planned dedacated oil temp gage.

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1st gen cummins 91.5 dodge d250 ,16cm turbo housing ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16



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