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I been seeing posts saying that Synthetic oil can really help with cold starting in the winter, but I can't find any Synthetic Diesel grade in the stores. The Autozone/Pep Boys/Strauss, etc... shops around all seem to have Rotella 20-50 and maybe one other brand of Dino Diesel oil and lots of Synthetic oil for gasoline engines, but no Synthetic for Diesels. What should I be getting and where do I get it?
Thanks
 

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My older brother runs a whole bunch of diesels for his excavation co. His favorite oil is 76 gaurdol QLT (not synthetic) -I use that now in my Scirocco. His mechanic swears that the engines he looks at that have used the Gaurdol qlt look better than anything else. That and maybe some Swepco 505 friction fighter would probably be very good. http://www.swepcousa.com/lubesite/add.htm
 

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So let me get this straight; we should use Synthetic in our Mk1 Diesels?
I just sold my 2001 TDI and I *had* to use Synthetic in it, but in my older Diesels, I've always just used regular "Diesel" oil.
How can synthetic oil help with cold starting?
Thanks!
 

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Re: (VW Scully)

I run Valvoline DureBlend in mine right now... Reason being is because I am transfering it over to Fully Synthetic when it gets cooler... I don't think that the previous owner put Synthetic in it, that's why I'm running about 3 changes of Durablend first... Then am gonna switch over to some nice synthetic stuff
 

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Re: (VW Scully)

Quote, originally posted by VW Scully »
How can synthetic oil help with cold starting?
Thanks!
Synthetic flows better when cold, so there's less drag on the engine from the oil pump. It also lubricates better when the engine is cold because it gets going quicker.
Even at operating temperature, most synthetics flow a little better and reduce the load on the engine from the oil pump. That can get you slightly better fuel mileage (1%-2% better is common), and a bit more power/torque to the wheels (every little bit helps in these cars).
 

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Re: (Racer_X)

WalMart here (Ohio) has Rotella synthetic 5w40 in gallon jugs for $13 or so. I just changed the oil in the caddy to this for the winter for the reasons Racer X noted above.
I'll probably use something heavier in the summer, maybe not. Rotella is a good dino oil, highly recommended by the big truck folks. I used Rotella 15w40 in my Dodge Cummins.
HTH
 

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$13 for a gallon sounds pretty good, Mobil 1 is about $20-$25 a gallon? That's only twice as much as good dino oil.
I've used the 'diesel' rated oils (mostly 76 Gaurdol, but I have used RotellaT) in my gasoline Sciroccos for years, I understand they're not really any different than a regular oil, but a bit higher in the quality range.
 

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Re: Where can I get Synthetic Diesel Oil? (towser42)

Take A look I have posted some info fom Amsoil
http://www.djcsyntheticoil.com
1981 VOLKSWAGEN RABBIT 1.6L 4-cyl VIN Code CR Diesel
FILTERS
Oil Filter......LF517
Air Filter......TS33
Fuel Filter......FF834
PCV Valve......N/R
Trans......TF59
BOSCH SPARK PLUGS
LS DELUXE
Wire......NR
Plug......NA
L CUSTOM
Wire......NR
Plug......NA
DELUXE
Wire......NR
Plug......NA
CUSTOM
Wire......NR
Plug......NA

BOSCH WIPER BLADES
Driver side......B40916
Passenger side......B40916
Rear window......B40916

CHASSIS LUBRICATION
0 Fittings, 0 Plugs
LUBRICANTS & FLUIDS
Engine Oil
Grade 1......CC
SAE 15W-40 Synthetic Heavy Duty Diesel and Marine Motor Oil
Synthetic Blend 15W-40 Diesel Oil
Series 3000 Synthetic 5W-30 Heavy Duty Diesel Oil
32 to 86°F......30
14 to 50°F......20W-20
14 to 86°F......20W-40, 20W-50
5 to 86°F......15W-40, 15W-50
-4 to 50°F......10W-30, 10W-40
68 to 104°F......40
-20 to 23°F......10W
Manual Transmission,.....GL-4
80W
Series 2000 Synthetic Gear Lube
SAE 75W-90 Synthetic Gear Lube
Automatic Transmission.....AE[1]
Esso Type LT 71141 Automatic Transmission Fluid - Not Available Through Amsoil Click here for more information
Automatic Transmission.....AF3[2]
Synthetic Automatic Transmission Fluid
Automatic Transmission.....AF2[3]
Synthetic Automatic Transmission Fluid
Differential, Front .....GL-5[4]
90
Series 2000 Synthetic Gear Lube
SAE 75W-90 Synthetic Gear Lube
SAE 80W-90 Synthetic Gear Lube
Fluids
Power Steering Fluid.....AF2
Synthetic Automatic Transmission Fluid
Brake Fluid.....HB
Hydraulic Brake Fluid, DOT-3 - Not Available Through Amsoil Click here for more information
Power Steering Fluid.....PS
Power Steering Fluid - Not Available Through Amsoil Click here for more information
Brake Fluid.....HB
Hydraulic Brake Fluid, DOT-3 - Not Available Through Amsoil Click here for more information
1. Verify fluid installed before topping off.
AE (part no. G 052 162 (-A1, -A2)) is clear-yellow in color.
2. Verify fluid installed before topping off. Alternate Lube
AE (part no. G 052 162 (-A1, -A2)) is clear-yellow in color.
3. Verify fluid installed before topping off.
AE (part no. G 052 162 (-A1, -A2)) is clear-yellow in color.
4. Final drive for automatic transmission only.

CAPACITIES
Engine, without filter..........3.7 quarts[1]
Cooling System, Initial Fill..........7.4 quarts
Automatic Transmission, Initial Fill..........3.2 quarts[2]
Automatic Transmission, Total Fill..........6.4 quarts
Manual Transmission, 4-spd..........3.0 pints
Manual Transmission, 5-spd..........4.0 pints
Differential, Front..........1.7 pints[3]
1. Capacity shown does not include filter. When replacing
filter additional oil may be needed. after refill check oil
level.
2. With ENG automatic transmission operating temperature, shift through all
gears. Check fluid level in PARK and add fluid as needed.
3. Final drive for automatic transmission only.

TORQUES
Oil Drain Plug.....22 ft-lbs
Manual Transmission
Fill Plug.....14 ft-lbs
Drain Plug.....14 ft-lbs

CAUTIONS
TRANS/DIFF
Do not add gear oil through plastic plug
on top of manual trans.
ENGINE
Engines with ridge on oil filter flange
need to have the filter re-torqued to 18
ft-lb after running eng for 3-5 minutes.
MISC
DO NOT USE DEXRON III. Verify fluid
installed before topping off. AE is
yellow in color.
COOLING
Models with red colored coolant, only use
VW part no. G012A8DA1. Do not refill or
top-off with any other coolant.
Thanks

SERVICE INTERVAL
http://www.amsoil.com/lit/g1490.pdf
 
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