- Joined
- Sep 28, 2002
- Messages
- 39,793
Hockey (okay if said with a heavy foreign accent)
Here's what I got at the 10k* mark (9 month). The engine is in a 99 Jeep TJ diven a good mix of highway and local driving. The vehicle drives four 50 mile comutes per week to and from work but has accumulated 69k miles in just 3 years (around 2k per month). The jeep naturally gets more use in the summer due to vacations and general recreational use. Until now (and looking at the data - I must have been off on a few estimates in regard to mileage) I've just changed to oil twice a year in the spring and the fall. I tend to do it just after the last near freezing weather ...and just after the summer heat in the brief moderate temperature season (around 50-65 degrees). The mileage, as mentioned, is somewhat biased to the summer season ...and since the accumulated mileage has averaged 23k per year ...I'm obviously having at least one oil interval that is over 7.5k ..which was my assumed interval. In fact it appears that I've been averaging 12k per oil change (*probably 9k and 15k). I modified the engine with the addtion of a high volume oil pump at 2500 which is when I went to synthetic oil (Mobil 1 in it's various configurations). The engine was further modified last year with the addition of a remote dual oil filter set up from Jegs (PermaCool). I opted for the Chevy style dual mount so I could use the 2 Qt chevy truck filters (Napa Gold #1794). The system now has 9.5 quarts of capacity and has never had any measurable consumption issues.
This is my first analysis. I had also broken my routine on the seasonal oil change. At the normal interval, this time, I merely changed out the filters and topped off the system. This sample was in the engine 9 months ..but given that almost half of my capacity is in the filters themselves ...?????
Anyway ..here it is:
Aluminum 7
Chromium 2
Iron 78
Copper 6
Lead 23
Tin 1
Moly 64
Nickel 2
Maganese 1
Silver 0
Titanium 0
Potassium 2
Boron 75
Silicon 13
Sodium 9
Calcium 2795
Magnesium 183
Phos 773
Zinc 966
HS (?) 0
TBN was at 2.5 ..so it was assumed that this oil was shot.
Blackstone commented that most of the stuff here was normal or perhaps "typical" would be more appropriate a term with the exception of LEAD with was a bit high @ 23 ppm. No coolant or fuel was present.
I've now gone to Delvac 1 and am eager to see results from that during this most recent change over. If the numbers are favorable ...I will extend that drain interval to 9 months and see what that future analysis yields (I'll keep better track on the mileage). I may have to detune this system to make it economical. I may switch to the 1 quart chevy filters to make this work out better for a six month interval if the oil fatigue appears time weighted instead of mileage.
All comments are welcome!
Here's what I got at the 10k* mark (9 month). The engine is in a 99 Jeep TJ diven a good mix of highway and local driving. The vehicle drives four 50 mile comutes per week to and from work but has accumulated 69k miles in just 3 years (around 2k per month). The jeep naturally gets more use in the summer due to vacations and general recreational use. Until now (and looking at the data - I must have been off on a few estimates in regard to mileage) I've just changed to oil twice a year in the spring and the fall. I tend to do it just after the last near freezing weather ...and just after the summer heat in the brief moderate temperature season (around 50-65 degrees). The mileage, as mentioned, is somewhat biased to the summer season ...and since the accumulated mileage has averaged 23k per year ...I'm obviously having at least one oil interval that is over 7.5k ..which was my assumed interval. In fact it appears that I've been averaging 12k per oil change (*probably 9k and 15k). I modified the engine with the addtion of a high volume oil pump at 2500 which is when I went to synthetic oil (Mobil 1 in it's various configurations). The engine was further modified last year with the addition of a remote dual oil filter set up from Jegs (PermaCool). I opted for the Chevy style dual mount so I could use the 2 Qt chevy truck filters (Napa Gold #1794). The system now has 9.5 quarts of capacity and has never had any measurable consumption issues.
This is my first analysis. I had also broken my routine on the seasonal oil change. At the normal interval, this time, I merely changed out the filters and topped off the system. This sample was in the engine 9 months ..but given that almost half of my capacity is in the filters themselves ...?????
Anyway ..here it is:
Aluminum 7
Chromium 2
Iron 78
Copper 6
Lead 23
Tin 1
Moly 64
Nickel 2
Maganese 1
Silver 0
Titanium 0
Potassium 2
Boron 75
Silicon 13
Sodium 9
Calcium 2795
Magnesium 183
Phos 773
Zinc 966
HS (?) 0
TBN was at 2.5 ..so it was assumed that this oil was shot.
Blackstone commented that most of the stuff here was normal or perhaps "typical" would be more appropriate a term with the exception of LEAD with was a bit high @ 23 ppm. No coolant or fuel was present.
I've now gone to Delvac 1 and am eager to see results from that during this most recent change over. If the numbers are favorable ...I will extend that drain interval to 9 months and see what that future analysis yields (I'll keep better track on the mileage). I may have to detune this system to make it economical. I may switch to the 1 quart chevy filters to make this work out better for a six month interval if the oil fatigue appears time weighted instead of mileage.
All comments are welcome!
