jpNcos

My local store charges $5.25 per quart here in Colorado Springs
Side note called local Porsche dealership asked for an oil filter 1 in stock $18.59
This is about a 5-7 year old dealership so I was actually suprised the parts guy knew that a 928 was a Porsche

Toms928

I thought Delvac was a diesel oil. May want to check into that. May have some additives you don't want or need. Just a thought.

pasa

HI TOM THIS IS A PREVIOUS POST FROM DOUG HILLARY REGARDING DELVAC DIESEL OIL






This Oil Condition Report (Used Oil Analysis - UOA) is the eighth and final. It may be of interest to those who have followed the previous seven reports over the past almost two years
The oil and filter were NOT changed at this point as ExxonMobil's Lab. report OK'd the oil for continued use. It will be changed about one month from now at Porsche's prescribed maximum time limit of twelve months or sooner if the distance covered exceeds 12k miles

This is the fourth UOA on Mobil's Delvac 1 5w-40, a fully synthetic commercial "mixed fleet" HDEO (heavy duty engine oil). This oil has both the highest diesel/petrol ratings and is the latest API "CI-4/SL" rated "mixed fleet" diesel engine oil. It also exceeds ACEA's A3 and B3 ( E3, 4, 5 & B4) ratings. It is suitable for high performance petrol engine vehicles and meets the 928's viscosity and quality requirements stated in the Owners Handbook

Details:

Car - MY89 - 928S4 Auto
Speedo - 84557 miles (136163kms)
Oil - Mobil Delvac 1 - 5w-40 full synthetic - API rated as "CI-4/SL"
Oil/filter change date - 09/20/03 (OEM "MANN" filter used )
Distance since oil/filter changed - 11848 miles (19079kms)
Time since oil/filter changed - eleven+ months
Oil used since oil/filter change - nil (still near "FULL" mark)
Date of this sample - 8/23/04
Distance since last UOA - 1545 mile(2488kms)
Time since last UOA - approx. four months
Use in this period (approx) - 10% town, 13% urban, 77% hiway
Avg speed in period - 44 mph (70km/h)
Fuel economy in period - 20mpg US (11.8ltr/100km) (24 mpg Imp)
Ambient in this period - from 35c high to -3c low Humidity in this period - 88% (highest)

Oil Condition - "use" factors;

Viscosity OK - 92 (excellent)
Water OK - 0.0%
Soot Index OK - 0.00
TAN OK - 3.7. (excellent) - Start 1.00 & Max allowed 8.9

Lab. Report Summary

ExxonMobil's rating now - "Normal"
Status-Excellent for continued use
Last Report - "Normal"


Elemental (& wear metal) Analysis;

Detail of the Elemental columns are:
Col 1 = this UOA (my comments in brackets)
Col 2 = averages of all eight UOA's
Col 3 = Oil Industry's "acceptable" max. wear rates (rounded) & not 928 specific

Iron 10 ( excellent ) [8] (( >100 ))
Aluminium 6 ( excellent ) [4] (( >30 ))
Chromium 1 ( excellent ) [<1 ] (( >30 ))
Copper 4 ( excellent ) [4] (( >50 ))
Lead 11 ( excellent ) [6] (( >100 ))
Silicon 5 ( excellent ) [8] (( >30 ))
Sodium 6 ( excellent ) [4] (( >10 ))

Note:
The elemental/wear metal rates are very low. All are around the previous averages and well below the Auto Industry's "acceptable" figures. This indicates that the rings, pistons, bores, cams, bearings and other major components are wearing at a very very low rate indeed
This is another "technical analysis" of why the 928 engine is so durable in normal use when using the Porsche recommended (or better) lubricants that are changed at Porsche's recommended servicing intervals

Oil Condition Summary:

The lighter 5w-40 viscosity oil has now been used for almost 12000 miles (19079kms) over about eleven months. During this time the car was driven above 100mph(160km/h) for some long periods in 30+C and at below freezing temperatures
This very high quality oil has contributed to the overall lowering wear rate trends and has caused the wear trend averages to fall accordingly
The oil will be changed in September according to Porsche's time - maximum 12 months use - recommendation, but the maximum distance may still be reached!

RENNLIST's 928 owners now have a very good baseline of UOAs from which to measure their own engine's wear and oil degradation rate trends. This will also assist those persons who race our engines.
A number of Labs. in NA do UOAs - but it is always better to use one that is well known

Regards
__________________
Doug Hillary
Rennlist Member # 030204-2681/060810-4400
01 Boxster (986) 2.7 Tiptronic (Delvac 1 5w-40 CI-4/SL)
06 Mercedes Benz CLK Kompressor (M1 0w-40 SM/CF)
08 Suzuki Burgman AN650 (Castrol R4 5w-40 (SG/MA)
(MY89 928S4 Auto - sadly sold - Delvac 1 5w-40)
Doug Hillary is offline Report Post Reply With Quote

hacker-pschorr

Mobil 1 5w-40 Turbo Diesel Truck aka Delvak is a great oil as long as your car is happy with 5w-40.

Mine experience didn't work out so well:
https://rennlist.com/forums/4271809-post35.html

My lifters were also clacking like crazy at idle. I switched back to Xw-50 weight and haven't had any problem since.

I still use it in my cars that take 40 weight, just not the 928's.

For a complete list of high quality 40 weight or lower oils, see the VW approved list. For those not aware, late model VW's have been having some major oil sludge issues.
This list is VW's attempt to help rectify part of the issue caused by using crap oil:
http://www.vw.com/myvw/yourcar/maint...mendations.pdf

James Bailey

Redline Racing the last couple oil changes trying to keep the rod bearings in place seems to help with the lower hot oil pressures I see after 15-20 minutes of grinding around the track.....stuff is expensive.

pasa

My car holds 5 bar at cold idle and 2 bars at hot idle no oil pressure light ever and it is driven mostly during Canadian summers average of about 30 deg cel.


cheers

Want to be

Valvoline performance 20/50 on all my Porsche's air cooled or water. I am surprised nobody else posted using this product. I believe most race cars use Valvoline. Seems to be a good product.

hacker-pschorr

Post #9
Valvoline VR1 is in my car right now.