Delvac 1 5w-40, 5016 miles, Porsche 928S4 V8

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Hi,

This is the sixth UOA on Mobil's Delvac 1 5w-40 CH-4/SJ oil used in this engine
Ten UOA's were undertaken over the last three years


Details:

Car - PORSCHE - MY89 - 928S4 Auto (alloy DOHC 32v water cooled V8 @ 320hp)
Speedo - 145168kms (90150miles)
Oil - Mobil Delvac 1 5w-40 CH-4/SJ
Oil/filter change date - 14/9/04
Distance since Oil/filter changed - 8078kms (5016miles)
Time since last UOA - approx. six months
Distance since last UOA - 2491kms (1547miles)
Oil used since fill - nil
Date of this sample - 16/9/05
Use in this period - 5% town,12% urban,83% hiway
Avg speed in this period - 68 km/h (42 mph)
(includes some sustained running at 100+mph @ 33+C)
Fuel economy in this period - 12.1ltr/100km
Ambient in this period - +42C high to -2C low
Humidity in this period - 98% highest

The columns below are as follows;
Col 1 = this UOA
Col 2 = [?] average of the three UOA's at OC point

Oil Condition;

Viscosity @40C 89 [90]
Water 0.08%
Soot Index 0.0
Sodium 3
TAN 3


Lab. Report Summary

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

Elemental ( & wear metal ) Analysis;

Iron 14 [11]
Aluminium 5 [5]
Chromium 1 [1]
Copper 3 [4]
Lead 5 [8]
Silicon 4 [5]
Sodium 3 [5]
Tin
As the oil was 12 months old it was changed at this point
I invite your comments

Regards
Doug
 
Always enjoy your posts, Doug. As to not driving it enough, well, we get along a little in years and fifteen years is about right to start feeling comfortable with it, eh? Had my old Chrysler 10 years before having to let her go and she was still "new" to me . . . .

Hope you'll have plenty of time for the passing manuevers around those big rigs you spec for!
 
Hi Tan,
thanks - and yes, thats me alright!

I hope you are OK in Dallas, our hearts go out to all affected by the storms!

Regards
Doug
cheers.gif
 
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