"Did your previous UOAs for these 2 cars show high fuel dilution?"
From an earlier post, see below. The fuel was 3.5 % at 3,000 miles but went down to 1 % at 4,000 miles sampling the same oil. It was not changed. Just before taking the sample at 4,000 miles I went for a few hour drive at up to 90 MPH:
Oil analysis for 2003 Ferrari 575 Maranello:
The Ferrari was delivered with Shell Helix Ultra 5w30. At 775 miles on 23 May 2003 the oil was changed to 0w30 Mobil 1. At 2,250 miles on 14 November 2003 the oil was changed to 0W-20 Mobil 1. With 5,300 miles on the car, and 3,000 mile on this fill of 0W-20 I sent in a sample for analysis. The original oil tested was from a left over bottle from the original Mobil 1 oil cases. So it is of the same age as the oil in the engine. No additional oil was added to the car. The next sample was at 4,000 miles on Mar 19, ‘05.
__________New __________Ferrari_______
______0W-20 Mobil 1 ___With 3,000 Mi __With 4,000 Mi on the oil
................................................................................................................
Iron__________ Chromium _____ Nickel ________ Aluminum ______3__________10___________9
lead __________ Copper ________ Tin ___________ Silver ________ Titanium ______ Silicon ________4___________10__________8
Boron ________247_________220_________178
Sodium _______15__________15__________15
Potassium ____ Molybdenum __ 164_________141_________86
Phosphorus __1375________ 1353________1243
Zinc ________ 1328________1313________1169
Calcium _____ 3456________3143________2742
Barium ______ Magnesium ____53_________154_________111
Antimony _____ Vanadium _____ Fuel %Vol _____0__________3.5__________1.0
Abs Oxid ______?__________48__________28
Abs Nitr _______?__________13__________4
Wtr %vol ______0_________ Vis CS 100C ___9.0________8.1 _________8.3
SAE Grade ____20_________20 __________20
Gly test ______NEG_______NEG _________NEG
TBN _________9.87_______not done_____not done
I tested my oil using this company, I do recommend them:
www.youroil.net
Go to this page and download this Excel file to see other peoples results:
http://members.rennlist.com/oil/
aehaas