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#1310758 - 12/13/08 07:06 PM RL 5W30 in 81 Rabbit Diesel 9300 mi
wbhgrace Offline


Registered: 12/11/08
Posts: 2
Loc: Seattle, USA
Redline 5W30 in a 1981 VW Rabbit Diesel (non-turbo). 33K mi on rebuilt engine. Fuel is 100% biodiesel (with an occasional few gallons of petrodiesel in the winter to prevent gelling). Oil has 9300 miles on it with a filter (Mann) change at 5000 mi. A total of 2 quarts of makeup oil were added, including the 1 quart the filter holds. 5 quart sump including filter. Vehicle commutes 12 miles each way daily in Seattle (temps range from about 25F in the winter to about 90F in the summer). Si is kind of high - air filter has 20K mi on it so will be changed soon. I apparently didn't get a soot level reading - maybe I have to ask for that specifically? Any comments on this oil in this application? Thanks for taking a look.

Here are the results from Blackstone:
Aluminum 4
Chromium 3
Iron 33
Copper 12
Lead 6
Tin 3
Molybdenum 753
Nickel 0
Manganese 0
Silver 0
Titanium 0
Potassium 2
Boron 31
Silicon 27
Sodium 23
Calcium 2721
Magnesium 8
Phosphorus 1071
Zinc 1293
Barium 0

SUS Viscosity @ 210F 62.4
cSt Viscosity @ 100C 10.9
Flashpoint 440F
Fuel % <0.5
Antifreeze % 0.0
Water % 0.0
Insolubles % 0.4
TBN 7.4
_________________________
-Will

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#1310771 - 12/13/08 07:34 PM Re: RL 5W30 in 81 Rabbit Diesel 9300 mi [Re: wbhgrace]
LargeCarManX2 Offline


Registered: 09/23/06
Posts: 2279
Loc: Up here in the NorthWest
Wow...this is a great combo!

Look for the baseline virgin silicon and take that off the 27...you might just be fine. I think this oil will go 15K and change the Mann at 7.5.
_________________________
"Success is the ability to go from one failure to another with no loss of enthusiasm."
Sir Winston Churchill

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#1310816 - 12/13/08 08:32 PM Re: RL 5W30 in 81 Rabbit Diesel 9300 mi [Re: LargeCarManX2]
LargeCarManX2 Offline


Registered: 09/23/06
Posts: 2279
Loc: Up here in the NorthWest
This is 5-40:

So you would take your number 27-16 of virgin and this =11


Total miles 0
Miles on oil 0
Date 10/18/2008
OIL Redline
Weight 5w-40
Make up oil VOA

ALUMINUM 0
CHROMIUM 0
IRON 0
COPPER 0
LEAD 0
TIN 0
MOLYBDENUM 3
NICKEL 0
MANGANESE 0
SILVER 0
TITANIUM 0
POTASSIUM 0
BORON 2
SILICON 16
SODIUM 0
CALCIUM 2522
MAGNESIUM 6
PHOSPHORUS 1097
ZINC 1308
BARIUM 0

SUS @ 210F 78.5
cST @100C 15.15
Flashpoint F 440
Fuel % -
Antifreeze % -
Water % 0.0
Insolubles% 0.0
TBN 10.8
_________________________
"Success is the ability to go from one failure to another with no loss of enthusiasm."
Sir Winston Churchill

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#1310946 - 12/13/08 11:42 PM Re: RL 5W30 in 81 Rabbit Diesel 9300 mi [Re: LargeCarManX2]
wbhgrace Offline


Registered: 12/11/08
Posts: 2
Loc: Seattle, USA
Thanks for the suggestion. I found a VOA of RL 5W30 from 2004, and the Si was at 17, so that lines up well with the 16 you found.
_________________________
-Will

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#1312334 - 12/15/08 11:39 AM Re: RL 5W30 in 81 Rabbit Diesel 9300 mi [Re: wbhgrace]
addyguy Offline


Registered: 09/08/05
Posts: 13428
Loc: Canada
Looks great - interesting application for RL 5W-30. Insols. might be your limiting factor - even after a filter change, you're at 0.4 at 9k miles. Might only get 12k miles out of a change, but that is pretty good!
_________________________
2003 Mazda Tribute LX V-6, 172k miles.
Oil: QS Defy 5W-20; Fram Ultra XG2 filter.

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