[Jay S]

Originally Posted by Schurkey

In general, silicon is from poor air filtering--dust/dirt/sand. I'm not saying there can't be exceptions, but that's the first place I'd be investigating.

ESPECIALLY if you've got an oiled-gauze air filter that still looks nice and clean, or a modified air filter housing that doesn't seal to the air filter element properly.

I agree in those things. If there is an issue with air filtering it could be tied right to the lead also if the engine inhaled something and some particles made it to the bearings. The trimetal bearings only have about a .001” thickness to get the the layer that contains lead, then the lead will leach out and raise the ppm in the UAO. Most main bearings used in Pontiacs are trimetal.

Silicon is used in bimetal King SI and HP bearings, and all the EngineTech bearings. I have engines with King HP rod bearings and trimetal mains, so it is possible to have higher levels of lead and Silocon from bearing debre with some combinations of bearings.

[tjs72lemans]

For me, I have the stock dual snorkel intake and new filter. It seals tight, so I think it's filtering as it should.

[geeteeohguy]

Your molybendum and Boron are super high as well. I would use a boutique oil and have it tested again at the oil change interval.

[tjs72lemans]

I put Driven GP1 10W30 in just like my last oil before oil change. I'll have it tested after about 2000 miles and see how it comes back (that could be two years though!).

[Formulajones]

Don't think I'd leave it in 2 years. I'd be interested in seeing that oil sample, lol. How old was the oil from the last analysis? Were they made aware or just mileage?

Very few oils have an additive package that promotes long time storage like that, which is what that would be considered given you only drive 1000 miles a year.

I'm not sure if Driven is that way or not or if they make one specific, but Amsoil does make an oil specifically for that purpose with an additive package that fights against moisture and corrosion that typically happens with cars that sit for periods of time. Especially if you live in a moist climate.

[Jay S]

Driven GP1 uses an additive for long term storage. Supposedly similar to what the military uses.

I wonder if long term storage could raise the lead level if a source of lead is exposed?

The levels from the sample of moly and boron are typical of GP1, those are in a normal range for that oil.

[jhein]

Originally Posted by Jay S

Driven GP1 uses an additive for long term storage. Supposedly similar to what the military uses.

I wonder if long term storage could raise the lead level if a source of lead is exposed?

The levels from the sample of moly and boron are typical of GP1, those are in a normal range for that oil.

That's great info to know, thanks very much.

[Formulajones]

Good to know there are others that offer that kind of additive package.

I don't know what sitting a long time does to the oil, I've never sent a sample in that's just been sitting for months but I'd be interested in seeing one. With oils formulated just for that purpose I can see where it might be concerning.

[jhein]

Originally Posted by Formulajones

Good to know there are others that offer that kind of additive package.

I don't know what sitting a long time does to the oil, I've never sent a sample in that's just been sitting for months but I'd be interested in seeing one. With oils formulated just for that purpose I can see where it might be concerning.

The sample I sent in sat over the winter, 5-6 months. I'll be sending in another sample in about 2-3 months that will be "fresh" after about 2000 miles.

[tjs72lemans]

My oil was last changed in 2021, or three years ago. But, I was only driving about 700 miles/yr.

[78w72]

Originally Posted by tjs72lemans

My oil was last changed in 2021, or three years ago. But, I was only driving about 700 miles/yr.

Same here... sometimes 1 or 2 of my cars dont get driven much for whatever reason, working on them or on something else, its hard to put lots of miles on multiple cars sometimes living in the midwest with a shorter driving season than those in year round warm climates.

If i have less than ~1000 miles on the car for the season I dont change the oil, its a complete waste, oil doesnt go bad sitting in the pan (or bottle) in that short of time, same for the filter. If the engine is healthy & not dumping raw fuel into the oil or other major issues like that, the additives neutralize any combustion by products and the anti wear additives dont go bad while sitting. My engines are clean lower mile rebuilds so no high mileage sludge or anything.

I also spoke to valvoline about long term use & was told the same thing, 1-2 years at low miles is not an issue at all, neither is new oil in the bottle for 5 years or more if stored properly. I have & use oils rated SN & SM & even some 15+ year old rotella-T SL grade.... stored in climate controlled area off the ground, shake them every year or so & again before using.

Valvoline FAQ- "DOES MOTOR OIL EXPIRE? IF NOT, HOW LONG DOES MOTOR OIL GENERALLY LAST?
Valvoline motor oils do not have documented expiration dates. When stored under optimal conditions, the product remains stable for an extended period of time. It can be used as long as the American Petroleum Institute (API) rating on the label continues to meet or exceed the requirements listed in your car’s owner's manual. If the rating is still current, we advise you shake the container before use to blend any additives that may have settled."

[locomotivebreath]

How long did it take to get your results back from the lab - Blackstone I presume ?

[jhein]

Originally Posted by locomotivebreath

How long did it take to get your results back from the lab - Blackstone I presume ?

Much longer than I expected. After about a month I called them to make sure they got the sample. It was 2 months before I got the results.

[grivera]

The last two time I sent samples the results were sent to me within three weeks - the most recent was about a month ago

[locomotivebreath]

Wow , 2 months . I did an analysis in 2015 on my F150 , I don’t recall exactly but I know it didn’t take more than a week or two . I sent a sample of penngrade 10w40 off to BS 18 days ago , I was expecting any day results lol

[hurryinhoosier62]

Originally Posted by 78w72

Same here... sometimes 1 or 2 of my cars dont get driven much for whatever reason, working on them or on something else, its hard to put lots of miles on multiple cars sometimes living in the midwest with a shorter driving season than those in year round warm climates.

If i have less than ~1000 miles on the car for the season I dont change the oil, its a complete waste, oil doesnt go bad sitting in the pan (or bottle) in that short of time, same for the filter. If the engine is healthy & not dumping raw fuel into the oil or other major issues like that, the additives neutralize any combustion by products and the anti wear additives dont go bad while sitting. My engines are clean lower mile rebuilds so no high mileage sludge or anything.

I also spoke to valvoline about long term use & was told the same thing, 1-2 years at low miles is not an issue at all, neither is new oil in the bottle for 5 years or more if stored properly. I have & use oils rated SN & SM & even some 15+ year old rotella-T SL grade.... stored in climate controlled area off the ground, shake them every year or so & again before using.

Valvoline FAQ- "DOES MOTOR OIL EXPIRE? IF NOT, HOW LONG DOES MOTOR OIL GENERALLY LAST?
Valvoline motor oils do not have documented expiration dates. When stored under optimal conditions, the product remains stable for an extended period of time. It can be used as long as the American Petroleum Institute (API) rating on the label continues to meet or exceed the requirements listed in your car’s owner's manual. If the rating is still current, we advise you shake the container before use to blend any additives that may have settled."

Combustion byproducts in oil have a nasty tendency to turn acidic in the presence of moisture. I’ve seen it in aircraft recip engines and classic automotive engines as well. Changing the oil is cheap insurance to prevent acid damage of internal engine components.

[Formulajones]

That's why I mentioned the oils formulated to those specific situations of sitting for long periods. That meant in the engine and have been run to some extent. As you said they get vary acidic and cause corrosion etc...

The article quoted above is referring to oil sitting in its original container. Completely different scenario.

Just making sure people are aware of the distinction so there is no confusion

[78w72]

Originally Posted by hurryinhoosier62

Combustion byproducts in oil have a nasty tendency to turn acidic in the presence of moisture. I’ve seen it in aircraft recip engines and classic automotive engines as well. Changing the oil is cheap insurance to prevent acid damage of internal engine components.

Yes im aware of combustion byproducts and acids etc... there are additives in all oils that neutralize them, with lower miles as mentioned, the additives do what they are supposed to do... theres no difference from sitting for a short time with lower miles than driving the car to reach the maximum miles before an oil change, if anything taxed oil at the end of its life has more acids in it and is exposed to more moisture from starting & driving. Clean low mile oil is perfectly safe to sit for a few months during storage or a full year. Valvoline confirmed this when I asked.

Originally Posted by Formulajones

That's why I mentioned the oils formulated to those specific situations of sitting for long periods. That meant in the engine and have been run to some extent. As you said they get vary acidic and cause corrosion etc...

The article quoted above is referring to oil sitting in its original container. Completely different scenario.

Just making sure people are aware of the distinction so there is no confusion

The valvoline article/FAQ was quoted in regards to new oil in the bottle, as I mentioned I have/use older but new oils all the time without issue, and there are lots of people out there with stashes of older oils older than 5-8-10 years.

Some people seem to think new oil goes bad sitting in the bottle for a few years so I quoted the info. Some also think clean oil with lower miles in the engine for ~1 year goes bad and needs to have a special additive package... but then again some think they need VR1 racing oil in their stock cam engine, none of that is true or based on any scientific proof. Valvoline as well as many mechanics I know have said low mile clean oil is perfectly fine to use after 1 year, and based on my experience of doing that for 25+ years theres is nothing to indicate otherwise.

[Formulajones]

Yes but that's not what I was referring to when I mentioned oils formulated for sitting. I was talking about oils already in an engine and the car just sitting for long periods. There are oils formulated just for that purpose that fight against the moisture and corrosion that happens in those situations.

I just wanted to make that more clear in my second post because it seemed my first post was being misunderstood.

[78w72]

I understood what you meant but there may have been some confusion on why I posted the FAQ... I mentioned the valvoline FAQ pertaining to new oil sitting in the container...

but right before that FAQ I also mentioned what valvoline tech told me regarding low mile clean oil sitting for a short time like 1 year or so... all oils have additives designed to fight against acids, moisture & corrosion, you dont need a specialty oil/additives for that situation based on everything Ive been told from reputable sources. The comment of 700 miles/year for 3 years would be a little high for me, I usually go by a 1000 miles or less rule.

1 year on low mile clean oil in a healthy engine is not an issue, of course most oil companies give an umbrella statement saying it needs to be changed in 1 year but no mention of miles or storage situations.. and they want people to buy more oil. There are plenty of UOA's of oils going longer than that on BITOG or at much higher miles than the 3000-5000 suggested intervals that show they have a lot more life in them. Even the OP's UOA showed the oil is still good, they just mentioned a couple areas that were higher than usual with no specific reason why.