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.
 
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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.
 

piopio

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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..
 

Al

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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]
 
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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.
 
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I don't think it's entirely from the track driving. Sodium seems elevated, so is silcon... What does that mean, [I dont know] But I am fairly certain you don't need 10w-40 and that these results could be improved...
 

piopio

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The cams do sit in bearings, but I have removed the balance shafts so no bearing there [Smile] 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?
 
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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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