[Top]

I have some diesel fuel additive that I'll burn up on this oil change.

Yeah, this was the last sample. I have another to send off and realized I never posted this sample from last year.

 

[Top]

Well damn.

 

[biodiesel]

@Top, did you run Diesel Extreme?

 

[Top]

@Top, did you run Diesel Extreme?

This sample was taken in February. I just sent it in. You suggested the Diesel Extreme in May. Since then, I have run one tank of diesel with the additive juice I bought a while back, Opti-Lube Summer+. I had it on hand so thought I'd use it up. I will get the Diesel extreme and use it as you suggest when I've finished the Opti-Lube Summer +. I only have about three doses left. It's kinda old too.
Obviously this has elevated quite a bit, so I'm going to resample and see how it is going. Then based on results, continue to 8,000 miles, change oil and filter as I'm about 5,000 miles from when I last changed the oil.

 

[OhioTech]

This sample was taken in February. I just sent it in. You suggested the Diesel Extreme in May. Since then, I have run one tank of diesel with the additive juice I bought a while back, Opti-Lube Summer+. I had it on hand so thought I'd use it up. I will get the Diesel extreme and use it as you suggest when I've finished the Opti-Lube Summer +. I only have about three doses left. It's kinda old too.
Obviously this has elevated quite a bit, so I'm going to resample and see how it is going. Then based on results, continue to 8,000 miles, change oil and filter as I'm about 5,000 miles from when I last changed the oil.

And now we know why some of these have suffered sudden bottom end failures - you may have found your problem before the end result! And THAT, my friends, is why we do sampling!

 

[Top]

Well I’m not that convinced that this is or can change things all that much. There is a member I recall that had all good oil analysis over years but his engine failed like many others that never had oil analysis done. I don’t think OA can predict oil passages clogging with soot. But hey, WTFDIK?

And now we know why some of these have suffered sudden bottom end failures - you may have found your problem before the end result! And THAT, my friends, is why we do sampling!

 

[OhioTech]

Well I’m not that convinced that this is or can change things all that much. There is a member I recall that had all good oil analysis over years but his engine failed like many others that never had oil analysis done. I don’t think OA can predict oil passages clogging with soot. But hey, WTFDIK?

Does a good job of showing an injector failure/dilution concern that will soon be a bearing failure though!

 

[biodiesel]

Does a good job of showing an injector failure/dilution concern that will soon be a bearing failure though!

I've been making the same argument for a few years now. I think fuel dilution is a bigger problem than what most of us know. I've read several posts in which the owner smells diesel fuel in their oil, or their oil level is much higher than it should be, or they noticed the dilution when they wiped the dip stick. In all cases, these were observations being made AFTER the engine had failed. None of them monitored their oil via sampling. @Top has taken oil samples, so he might be able to save his engine before doing permanent damage, but in my opinion, he should be sampling more often.

 

[Top]

Does a good job of showing an injector failure/dilution concern that will soon be a bearing failure though!

It does show fuel dilution no doubt. It just seems that several of the failures I've read about were caused by oil starvation due to clogged oil passages in the bedplate thing. But like I said. WTFDIK?

I've been making the same argument for a few years now. I think fuel dilution is a bigger problem than what most of us know. I've read several posts in which the owner smells diesel fuel in their oil, or their oil level is much higher than it should be, or they noticed the dilution when they wiped the dip stick. In all cases, these were observations being made AFTER the engine had failed. None of them monitored their oil via sampling. @Top has taken oil samples, so he might be able to save his engine before doing permanent damage, but in my opinion, he should be sampling more often.

I have and will continue to do oil analysis. Even with the 9% fuel in my last sample the viscosity was still 12.2 which isn't the greatest, but it was a full 10k miles. The iron did increase in the last sample like 71%, but still a relatively low 24 ppm. I doubt I'll go longer than 8k miles on an oil change from here on. I will also continue with the fuel injection cleaners in hopes they can cure what ails the injectors.

I should have results from my 5k mile sample today or tomorrow.

I believe CB919 is the guy who did regular OA and everything was gravy until it shiddabed.

 

[OhioTech]

There isn’t a single cause of failure.
Analysis won’t show coking.
And nothing will help with a torsional vibration failure. But you found a dilution issue early, and don’t have a failure yet. The added iron wear is due to the failure of the VII additive from the dilution. The KV100 being high can shift the range where the torsional vibration occurs (increases the weight of the crank assembly via heavier Windage cloud) and dilution may contribute to sudden failure in some cases.

Dilution will contribute to coking, as it breaks down the VII, which is what becomes the hard plastic you generally see!

It does show fuel dilution no doubt. It just seems that several of the failures I've read about were caused by oil starvation due to clogged oil passages in the bedplate thing. But like I said. WTFDIK?



I have and will continue to do oil analysis. Even with the 9% fuel in my last sample the viscosity was still 12.2 which isn't the greatest, but it was a full 10k miles. The iron did increase in the last sample like 71%, but still a relatively low 24 ppm. I doubt I'll go longer than 8k miles on an oil change from here on. I will also continue with the fuel injection cleaners in hopes they can cure what ails the injectors.

I should have results from my 5k mile sample today or tomorrow.

I believe CB919 is the guy who did regular OA and everything was gravy until it shiddabed.

 

[Top]

Well, I'm happy to see this.
This is Chevron DELO 400 XSP 5W-40
I don't quite understand the additive difference comments. Maybe Chevron changed the formulation from 2020 to 2021? It has some oil I purchased from Amazon in 2020 and the rest was purchased from NAPA in 2021, but it is all DELO 400 XSP 5W-40.

 

[biodiesel]

Well, I'm happy to see this.

I would say the fuel additives did their job! No more sticky and/or clogged injectors leaking!

 

[OhioTech]

Well, I'm happy to see this.
This is Chevron DELO 400 XSP 5W-40
I don't quite understand the additive difference comments. Maybe Chevron changed the formulation from 2020 to 2021? It has some oil I purchased from Amazon in 2020 and the rest was purchased from NAPA in 2021, but it is all DELO 400 XSP 5W-40.
View attachment 92421

Delo starts out very thick - please call them and ask them to run fuel dilution. As it’s not out of spec on KV100, it didn’t trigger an automatic test.

 

[OhioTech]

Well, I'm happy to see this.
This is Chevron DELO 400 XSP 5W-40
I don't quite understand the additive difference comments. Maybe Chevron changed the formulation from 2020 to 2021? It has some oil I purchased from Amazon in 2020 and the rest was purchased from NAPA in 2021, but it is all DELO 400 XSP 5W-40.
View attachment 92421

It’s labeled as Mobil Delvac on the submission.

 

[Top]

I would say the fuel additives did their job! No more sticky and/or clogged injectors leaking!

Well, time will tell but I'm not so certain. I've only used two double doses of the Opti-Lube Summer + prior to this sample being taken. This is only 5,500 miles, 2500 of which were towing. I did not take along any of the Opti-Lube on our trip up north. It's all warm weather driving. The previous sample was taken in February and not many long trips on the last 2,000 miles of the 10,000. It could be a combination of things. I will keep on using the Opti-Lube every tank at double dose until the next oil change at 8,000 miles.

 

[Top]

Delo starts out very thick - please call them and ask them to run fuel dilution. As it’s not out of spec on KV100, it didn’t trigger an automatic test.

I will do that.

It’s labeled as Mobil Delvac on the submission.

Yeah, I put that in there when I opened my account and haven't really bothered to figure out how to change it. I wrote the oil brand, type etc. in the notes section under the submission details.

 

[Top]

Well shite-
I guess the 'estimate' wasn't too close above. I had them run the GC for fuel dilution and it wasn't good, as you can see. Thanks to @OhioTech for the suggestion. Had it not been for that, my plan was to run to 8,000 miles and sample again. I'm going to change oil and filter, run the Amsoil fuel injector cleaner every third tank, alternating with the Hot Shot's Diesel Extreme and continuing to use the Opti-Lube Summer + I'll probably sample at 5,000 miles and see where it is.
I'm also planning to begin using the Exxon/Mobil Synergy diesel and pass on the less expensive Walmart, Cefco, Buc-ee's and other generic brands of diesel.

 

[OhioTech]

I’m glad I could assist.

A) There’s a ring seal problem
B) You have an injector leaking/excessive flow

That’s a LOT of fuel.

Perhaps have a look at the cylinder/injector offsets and see if there’s an obvious problem - or have a compression/leak down test performed?

 

[Top]

I’m glad I could assist.

A) There’s a ring seal problem
B) You have an injector leaking/excessive flow

That’s a LOT of fuel.

Perhaps have a look at the cylinder/injector offsets and see if there’s an obvious problem - or have a compression/leak down test performed?

Well, thanks again for the suggestion. I'm happy to have smart people that know way more than me to lean on.

I changed the oil this afternoon. I filled up with Mobil Synergy diesel and added the Amsoil injector cleaner. I should have read the instructions before I ordered the Amsoil injector cleaner because it calls for TWO bottles for clean up and one for routine maintenance.

Hopefully it is B and can be fixed with fuel additive and not a more costly situation like needing new injectors or a broken ring or something like that. I don't know what you mean when you say cylinder/injector offsets. What is that exactly?

I'm going to start a new thread about this fuel dilution thing because I think it warrants its own thread.

 

[Brokedownbutgood]

Well, thanks again for the suggestion. I'm happy to have smart people that know way more than me to lean on.

I changed the oil this afternoon. I filled up with Mobil Synergy diesel and added the Amsoil injector cleaner. I should have read the instructions before I ordered the Amsoil injector cleaner because it calls for TWO bottles for clean up and one for routine maintenance.

Hopefully it is B and can be fixed with fuel additive and not a more costly situation like needing new injectors or a broken ring or something like that. I don't know what you mean when you say cylinder/injector offsets. What is that exactly?

I'm going to start a new thread about this fuel dilution thing because I think it warrants its own thread.

Another option would be to pull the injectors and send them off to get tested. Broken rings would cause high crankcase pressure and likely a P04DB code. S&S diesel motorsports charges around $60 per injector to test them.