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My 2005 Unimog U500NA owners manual calls for 10W hydraulic oil in the hydraulic system. The hydraulic system powers the rarely used winches, but also the radiator cooling fans. Low stress but constant use. Mobil’s 10W hydraulic oil has a vis40 of 37.7. I live in Anchorage which can rarely get...

With "deletion" Fe dropped from 89 to 35, Al from 15 to 11, Pb from 2 to 2 bottle of Redline Breakin Additive to increase Zn and Ca 600ppm (from 840 and 1793 respectively). Also thinking about 15k OCI.

My Unimog, 25600 mi OCI, about 700 hrs, sump 29.6L, 10L makeup oil (2.5l/6250mi since new) Anchorage-Halifax-Antwerp-Ulaan Baatar-Germany-Venice-Antwerp-Halifax-Anchorage Delvac 1 SHC 5W40 according to my calculations the makeup oil decreases contaminates by about 16% using the exponential...

oil stress in kwh/gm: (1/R) * (1 - exp(-Rt/V)) R is specific oil consumption in gm/kwh t is time in hrs V is specific oil volume in gm/kw You have to figure out actual average power output by working backwards from average speed (available on newer vehicles electronic systems, or miles/hrs)...

Fe 59 down from 89 Cr 3 down from 4 PB 1 Cu 13 down from 15 Al 17 Ni 1 all others Mg 594 Ca 1535 P 700 Zn 809 Mo 41 B 80 Vis 11.1 Soot 0.4% TAN 3.27 down from 3.64 TBN 4.4 up from 4.0 Midway thru this cycle I deleted emissions, got new exhaust system and hp/torque cranked up ~10%. MPG is up...

I'm NE of Moscow Russia, have driven 16K mi this summer. Alaska to Halifax, Antwerp to Mongolia, now returning to W Europe. I run Delvac 1 75W90 in diffs and portal hubs. Yesterday I leaked 300ml out of 700 fron the inside (CV to portal) seal left front. I refilled 300 last night plus about 55ml...

I'm running cheap Russian diesel fuel, 500ppm sulfur, min cetane 45, cloud point -5C Only 25.90 rubles per liter or a $1.60 a gallon. Planning for 25,000mi OCI.

The DPF, SCR and EGR fell off, with ECU upgrade. I was thinking after my D1 LE 5W30 runs out to use M1 0W40. MPG has gone up almost exactly 10%, now has +40 hp and +60 ft-lb, kind of like a rocket despite >5000 lb. Charlie

Magnesium (Mg) 27 Calcium (Ca) 4800 Barium (Ba) 1 Phosphorus (P) 1280 Zinc (Zn) 1489 Molybdenum (Mo) Boron (B) 279 Vis 100 C 14.2 TBN 15.2 Charlie

https://www.ils.co.nz/ils/assets/downloads/SKU%20TDS/3380371.pdf An ACEA E6 oil with very high TBN (12.5) for SA level of only 1.0% E6 specifies P This oil might be good for TBN depletors like my 09 BMW X5 35d, if I could get some here in the US. And I don't need a 55 gal drum of it, just a...

All numbers not listed are zero or 1 Fe 36 Cu 3 Al 5 Si 3 Na 18 (same as VOA) Mg 51 Ca 4634 P 1399 Zn 1487 Mo 2 B 294 Vi 13.6 Fuel Soot 0.7 Water TAN 3.85 TBN 12.4 Makeup oil 6.5L in 29L sump Analysis done by Detroit Diesel in Portland I changed not because I thought it was used up but...

11000 mi Delvac 1 LE 5W30 all elements not listed are 0-1 Fe 76 Cr 4 Al 12 Cu 11 Si 4 Na 2 K 11 Mg 552 Ca 1450 P 634 Zn 685 Mo 39 B 74 Vi@100C 11.3 Soot 0.6% TAN 3.96 TBN 3.7 This is satisfactory. Charlie

I have often heard "CJ4 oils have better TBN retention than CI4+ oils". I'd like to post the image, but it is off a pdf file stored in my computer. It is a graph of TBN vs mileage going up to an 80K OCI with Delo 400 Multigrade 15W40 vs the LE formulation. In a fleet of 6 Freightliner Cascadias...

The results were somewhat disappointing. First, VOA on D1 LE: Al 2 Si 5 Na 5 Mg 762 Ca 1980 P 773 Zn 929 Mo 44 B 113 vis 12.0 TAN 3.54 TBN 9.6 (D4739) Next D1 LE Castrol SLX Prof LE 12600mi 9000mi 10000mi Fe 152 83 94 Cr 6 4 5 Pb 3 1 3 Cu 18 12 20 Al 26 27 33 Si 6 4 6 Na 3 5 7 K 20 31 51 Mg...

http://www.valvoline.com/products/commercial-industrial-products/heavy-duty-diesel-engine-oils/133 It claims to be both CJ4 and ACEA E6/MB228.51. If it meets the latter 2 specs it has DPF car and van engines (6xx engines). By "extrapolation", it COULD be usable in other mfgs' AdBlu/DPF engines...

I've calculated the viscosities at 13.07@100c, 80@40C, about where I want it for a heavy-ish 75W85 clone. But what about additive compatibilities? I had 6L of Delvac Syn Trans fluid 50 left and mixed it with 8 qt of MTL I had laying around. Should I dare try use it in my mega dollar 24 spd...

Straight 40 TBN 17.4 Ash 1.8% Zinc 1600ppm. Approvals: CD/CF, MB228.2 Pour point relatively low -29C. http://www.mobil.com/Egypt-English/Lubes/PDS/GLEGENCVLMOMobil_Delvac_1440.aspx Charlie

After 9000 mi (as opposed to 10.5K previously) TBN is still only 1.5, Fe down to 83 from 94, Al down from 33 to 27, Cu 20 down to 12. They didn't give me a TAN this time but the 1st time it was 4.83. I think the high metal numbers are partly breakin and partly acidic corrosion. I'll know for...

I convinced the dealer to let me try Delvac 1 LE 5W30 http://www.mobil.com/Lithuania-English/Lubes/PDS/GLXXENCVLMOMobil_Delvac_1_LE_5W-30.aspx in our X5 35d diesel while still under warranty. I'm doing a 2nd UOA of Castrol SLX Professional OE 5W30 @ 9000mi; I expect it will be exhausted as far...

http://www-static.shell.com/static/aus/downloads/product_data_guide/product_data_guide_transport.pdf Check out the Rimula R6M on p.9 Charlie