Redline 10W30, 6225 miles, 02 Sentra SE-R Spec V

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Here is my latest sample including my sample history. So running the oil longer + a track day could lead to higher lead number? What about the silicon number? Shouldn't it have dropped down from the previous oil change (on the previous oil change I changed my camshafts)

code:

Mi/Hr on Oil 3500 5162 5138 1949 6225

Mi/Hr on Unit 30500 35662 40800 42749 48974

Sample Date 8/13/2003 10/21/2003 1/18/2004 2/23/2004 6/15/2004



Aluminum 2 2 3 6 4

Chromium 1 1 1 1 1

Iron 6 10 6 12 13

Copper 4 6 4 3 6

Lead 3 2 0 2 8

Tin 0 0 0 1 0

Molybdenum 623 594 430 588 627

Nickel 0 1 0 0 0

Manganese 0 0 0 0 0

Silver 0 0 0 0 0

Titanium 0 0 0 0 0

Potassium 20 17 13 5 4

Boron 20 5 59 14 9

Silicon 13 13 12 21 20

Sodium 16 15 13 25 30

Calcium 3072 3113 2893 3045 3103

Magnesium 7 8 9 6 7

Phophorus 1275 1160 990 1197 1172

Zinc 1405 1261 1193 1312 1326

Barium 1 1 1 1 1



Viscosity 68.6 69.4 65.5 66.3 68.2

Flashpoint in F 445 400 430 460 440

Fuel % 0.5 0.5 0.5 0.5 0.5

Antifreeze % 0 0 0 0 0

Water % 0 0 0 0 0

Insolubules % 0.2 0.2 0.3 0.3 0.4



TBN 5.2 3.7 4.6 6.3 3.5


DAVID: Lead increased quite a bit in this sample. Lead normally comes from the bearings, so this
could be related to the two track events you listed on the slip, as well as the longer oil usage. Lead is
also found in some additives, if you have used one. We think the potassium and sodium are from the
Red Line oil, and not from antifreeze. The TBN read 3.5, showing some (not a lot) additive remaining.
If the lead is related to the track event or an additive, you could run more miles on your oil, if you
aren't racing. Try 6,500 miles next time and we will monitor lead.
 
A lot of anti-wear additives in there, yet still the lead. I wonder if using a thicker viscosity would help if you race again.
 
My hope is that I didn't mess up the cam install and the bearings there are wearing now...My hope is that it's just a lot of highly stressed motor from a day at the road coarse which caused the increased wear..
 
I think the numbers are O.K. I would check the areas around the intake, inclucing the duct betweeen the filter and the intake manifold.
smile.gif
 
the track day could easily explain the higher numbers. Do your camshafts sit in bearings , or are they like Honda motors where the cams just sit in aluminum journals ?. Keep in mind that your engine has balance shafts that sit in bearings as long as the connecting rods that use bearings, and possibly the camshafts. So lots of areas where lead can come from if the engine is under some stress such as a track day.

Redline uses alot of silicon as anti-foaming additive, on the order of 12-14 ppms. But your numbers jumped a fair bit, could be from the engine being opened up for the cam install, or a leak at the intake system.

For track days I normally go up one viscosity range, from 10w-30 to 10w-40 in Redline, the extra viscosity should help bearing surfaces under hard load. I just finished a day on Redline 10w-40 but I havent been able to analyze it yet , I normally run 10w-30 on the street.

thanks for posting all that info, keep us posted on further testing if you can. If you go back for a track day I suggesting going to a 10w-40 visc. of Redline.
 
I don't think it's entirely from the track driving. Sodium seems elevated, so is silcon... What does that mean,
dunno.gif
But I am fairly certain you don't need 10w-40 and that these results could be improved...
 
The cams do sit in bearings, but I have removed the balance shafts so no bearing there
smile.gif


I am going to double check my intake tonight.

I bought a new case of redline and the label has changed from the previous red label to a blue label..just for marketing or did they change the formula?
 
the sodium , potassium and at least 12-14ppms of silicon are directly related to Redline's formula, nothing to worry about there. The rest of the silicon has to be dirt/dust from the intake system I would say.
 
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