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#16
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My neighbor is an O/O
He said some old truckers told him that any time they have to get fuel in colder areas using 'winter blend' they add fresh hub oil to the fuel. He hasn't tried it but he's considering two stroke oil. I think the rule of thumb is one gallon oil per 100 of fuel.
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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine) Raleigh NC - Home of deep fried sushi! |
#17
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OKYOURABEAST -
I'm talking about highway driving in both cases. 70-72 mph... But you make a good point in that there was extra weight (passengers, gear) when on some of the trips to New England... Can't beat a good education, I always say...
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Mine: 1987 MB 420 SEL - 62K (Dec 2019) Mine:1991 MB 350SDL - 244K (Aug 2011)- Totalled 9/14/2016 Mine:1981 MB 300SD - 326K mi (July 1997)-sold Wife's: 2008 MB C300 Sport - 92K mi (April 2009) |
#18
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How about colder air being denser? Therefore being harder to push out of the way at 70+ MPH.
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"Poor Krusty, he's like a black velvet painting come to life." -Lisa Simpson
1995 E300D 216k black/mushroom 1982 300SD (sold) |
#19
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The Shell station around the corner from me boasts that they treat their diesel with powerservice Nov-March. Guess I don't need to haul the jug around in my trunk anymore.
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TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
#20
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I think that would be a small affect, and the denser air should actually help the engine efficiency.
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#21
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Winter diesel is going to give less MPG, but your speedo must be off, no way getting 33mpg out of a 617 unless its all downhill and your doing 45mph.
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
#22
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Greenwich, CT to UPenn, Philly, mostly highway 80 mph. Yes, I calculate mileage on the tripometer divided by galllons refilled to full. Yes, I was surprised by the 33mph but during mixed city/ highway, I was getting 28 this summer. My 83 300D is in great shape with only 115K miles on her and I am the 2nd owner. It has new tires from PO.
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85 300CD Signal Red/Tan sold 83 300D Manganese Brown 109K 97 E420 Midnight Blue 197K sold 98 BMW 328i Vert White 100K, sold 95 BMW 525i White 125K, sold 93 BMW 525iT Red 193K, sold 95 E320 Green Wagon 125K, sold 94 E320 White 127K, sold 85 300SD 156K Grey (Annie), sold 84 300D Lapis Blue 170K (Judy), sold 99 ML 320 Black (lease), 1998 C230 White (lease) 00 Honda S2000 Red (lease) 86 Mercedes 300E (sold) 84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold) |
#23
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Personally I see more of a change in MPG based on topagraphy traveled, elevation, load & tire pressure and a switch to snow tires than I do with a seasonal change in the fuel blend during highway driving.
Cold air is more dense and the engine produces more power with a cold air charge that is why a turbo vehicle has an intercooler. Some Bonneville racers have that intercooler packed in ice for that reason. Diesels take longer to warm up during the winter and it is during that longer warm up period that the engine is the least efficient. Cold oil and other fluids are just not condusive to high MPG especially on short trips even on the highway.
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FRED Daily Driver: 98 E300TD 199K Hobby Car: 69 Austin Mini Past Diesels: 84 300SD, 312K 87 300SDL, 251K 94 Chev. K-1500 6.5Ltr.TD, 373K |
#24
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Quote:
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#25
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By the numbers... BTU Content.
Diesel 138,700 kerosene 135,000 BioDiesel 126,200 Vegetable oil 123,143 Why shouldn’t I just use Diesel Fuel No. 1? While Diesel Fuel No. 1 has an advantage in low temperature operability, there are some disadvantages, as well. The energy content of Diesel Fuel No. 1 is about 95% that of Diesel Fuel No. 2 and will provide a correspondingly lower fuel economy. Diesel Fuel No. 1 is also lower in viscosity and provides less lubrication for the fuel pump and fuel distributor. Interesting reading: http://www.exxon.com/USA-English/GFM/Products_Services/Fuels/Diesel_Fuels_FAQ.asp http://www.biodiesel.org/pdf_files/fuelfactsheets/BTU_Content_Final_Oct2005.pdf
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92 300D 2.5L OM602 OBK #59 |
#26
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Energy content per weight is the same between gasoline (octane) and diesel (cetane) the difference is density. We buy fuel by volume not weight hence diesel has advantage over gasoline since it is denser. 1 gal of diesel weighs more than 1 gal kerosene and kero wieghs more than 1 gal gasoline.
If you think winter diesel is bad try winter gasoline with all the half burnt fuel (alcohol and other oxygenates).
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2010 ML350 Bluetec 2012 Mustang Convertible |
#27
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Quote:
Good info thanks ! I've seen these cars get 40 to 50 mpg...........................................Craigslist and ebay!! |
#28
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FWIW, those values appear to be BTU/gallon (higher heating values). I hate it when people don't use units (partial credit).
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#29
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What? 33mpg???
Quote:
I only WISH I could hit 33mpg! I'm running 33% B-99/66% Veggie here in Florida in my 1985 300D. This is the first snap of cold weather this year. 50's outside. Other than starting a lil rough it still runs fine! I've been told that the locals run 10% regular unleaded/90% Veggie in the winter. I have not tried this as of yet.
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2006 Jetta TDI DSG 320k miles 1997 Ford F150 325k miles 4.2L V6 "Work Truck" 2008 Tundra 225k miles 5.7L 1982 240D.....sold 1984 300D...Totaled OUCH! 1985 300D Turbo 222k miles "Dos" sold to 79Mercy 1986 300SDL 98K miles "The Beater"....sold 1987 190E 2.3 16v Euro spec 115K miles....sold Last edited by Hip001; 11-12-2009 at 01:27 PM. |
#30
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The science teacher in me 100% agrees with you. A label is as important, if not more important than the number itself.
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2009 ML320 Bluetec 1985 300CD 1981 300TD Past Mercedes 1979 300TD 1982 300TD 2000 E320 4Matic Wagon 1998 E430 1984 300SD 1980 300SD |
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