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  #1117  
Old 03-02-2014, 11:56 PM
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Re: Welcome ALL 2014+ Jeep Grand Cherokee Ecodiesel owners!

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Originally Posted by Vtail View Post
Wow, it's been quiet here on JeepGarage! At 2800 miles I've had to add a second quart of oil, and the oil life remaining is at 30%. At this rate I'll need to change my oil at 4,000 miles, not anywhere near 10,000. What is going on here? Should I be concerned (I already am...)? I suspect is has to do with the unusually cold winter here in MN this year and mostly very short trips, but still, only 4,000 miles on an oil change? It would be interesting to know the algorithm that goes into calculating the oil life remaining, and what the primary factors/inputs are.
There are actually a few factors that contribute to the poor oil life, that I know of. I suggested a while back to someone that the original oil I WOULD change around 1500 miles. I do it at 500 miles on engines I've hand built, but on a factory warrantied engine, I'd stretch it to 1500. And only bc it's a diesel. Not saying it'll be a problem for any who've chosen to exceed that, I've just seen some crazy things happen over the years with fresh engines and standardized servicing. Recent example being a friend of mine took his Vette in last year for its first oil change, and they said it pissed less than a quart out. There are several reasons why that could have happened, but considering my days as a tech, I can tell you that's not a rare occurrence.

Anyway, the (potential) factors:

1.) Extremely cold weather + engine break in, was a bad combo.. Not your fault, just the way the cards fell. New engines NEED heat.

2.) Lots of short trips. This can cause the oil to not only break down faster, in conjunction with stop-n-go traffic, but can lead to condensation in the oil if the engine wasn't brought up to operating temp for a sustained period of time. And this isn't just for oil. I've seen many exhaust systems rust out/thru simply bc of short driving distances in daily commutes which doesn't allow water in the exhaust to evaporate. In cold weather, the initial heat on start up causes MORE water to form in exhaust and needs to be heated for longer than a 10 minute ride to evaporate. Remote starting helps to warm the car faster, but idling helps neither the oil or exhaust to rid water.

2b.) Conversely, longer trips are not only better for fuel mileage, but oil life. Those who do mostly highway driving 50+ miles a day will possibly double your oil life. Last year I put almost 6k miles on my truck in an oil cycle doing mostly highway driving, and the light never came on. Typically it gets just under 3500 before it comes on.

3.)....... wait, I'm slightly buzzed at the moment. I forget what else I wanted to say. But yeah, mainly those two. You'll see the oil life skyrocket after initial break in, the first oil change, better weather, and extended trips. Next winter even if we do get another deep DEEP freeze, you should see substantial improvement even under the same conditions you stated now. Hope this helps.
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  #1118  
Old 03-03-2014, 12:00 PM
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Quote:
Originally Posted by chevyboy_711 View Post
There are actually a few factors that contribute to the poor oil life, that I know of. I suggested a while back to someone that the original oil I WOULD change around 1500 miles. I do it at 500 miles on engines I've hand built, but on a factory warrantied engine, I'd stretch it to 1500. And only bc it's a diesel. Not saying it'll be a problem for any who've chosen to exceed that, I've just seen some crazy things happen over the years with fresh engines and standardized servicing. Recent example being a friend of mine took his Vette in last year for its first oil change, and they said it pissed less than a quart out. There are several reasons why that could have happened, but considering my days as a tech, I can tell you that's not a rare occurrence. Anyway, the (potential) factors: 1.) Extremely cold weather + engine break in, was a bad combo.. Not your fault, just the way the cards fell. New engines NEED heat. 2.) Lots of short trips. This can cause the oil to not only break down faster, in conjunction with stop-n-go traffic, but can lead to condensation in the oil if the engine wasn't brought up to operating temp for a sustained period of time. And this isn't just for oil. I've seen many exhaust systems rust out/thru simply bc of short driving distances in daily commutes which doesn't allow water in the exhaust to evaporate. In cold weather, the initial heat on start up causes MORE water to form in exhaust and needs to be heated for longer than a 10 minute ride to evaporate. Remote starting helps to warm the car faster, but idling helps neither the oil or exhaust to rid water. 2b.) Conversely, longer trips are not only better for fuel mileage, but oil life. Those who do mostly highway driving 50+ miles a day will possibly double your oil life. Last year I put almost 6k miles on my truck in an oil cycle doing mostly highway driving, and the light never came on. Typically it gets just under 3500 before it comes on. 3.)....... wait, I'm slightly buzzed at the moment. I forget what else I wanted to say. But yeah, mainly those two. You'll see the oil life skyrocket after initial break in, the first oil change, better weather, and extended trips. Next winter even if we do get another deep DEEP freeze, you should see substantial improvement even under the same conditions you stated now. Hope this helps.
Great post. You've confirmed my suspicions. Thanks Chevy!
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  #1119  
Old 03-03-2014, 12:25 PM
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Re: Welcome ALL 2014+ Jeep Grand Cherokee Ecodiesel owners!

Chevy, what are your thoughts on the value of oil analysis?
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  #1120  
Old 03-03-2014, 04:26 PM
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Re: Welcome ALL 2014+ Jeep Grand Cherokee Ecodiesel owners!

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Originally Posted by GunnySpook View Post
Chevy, what are your thoughts on the value of oil analysis?
Oil analysis is a great tool to see the condition of an engine and how long it's got left. I recently had an oil analysis done on the big truck to check on the bottom end and see if it needs to be overhauled yet. 750k on the clock. CAT says it's good for now.

On a smaller (passenger) vehicle, I'd probably have one done if I was worried about something, but other than that, it's kinda overkill. Reason being, most of these engines in passenger cars (gas and diesel) never see the maximum stress load they can handle, even in stock form. Well, unless you tow/haul everyday with passengers inside, through the mountains. But even then, the suspension and driveline are usually the weak point. The engines can handle a bit more. Whereas conversely with heavy trucks (semis), the engines are stressed and pushed to the limit daily. So regular oil analyses are important to see what's up inside.
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  #1121  
Old 03-03-2014, 04:34 PM
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Re: Welcome ALL 2014+ Jeep Grand Cherokee Ecodiesel owners!

Perfect!

Thanks, Chevy!
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  #1122  
Old 03-03-2014, 04:52 PM
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Re: Welcome ALL 2014+ Jeep Grand Cherokee Ecodiesel owners!

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Originally Posted by Vtail View Post
A buddy of mine (same friend that went with Shannon and me to the JNAP tour last year) recently sent me the attached photo of his F350 diesel truck. He had the block heater plugged in for about 4 days. It's been really cold here in MN, and it sits outside, so I suppose he just wanted it ready to start whenever he needed it. Anyway, he was sitting in the house and heard a loud explosion. Went outside to find his truck on fire. Burned out the entire front end of the truck including tires. Not too long before this happened he drove up the drive in his car and didn't see any smoke or anything coming out from the hood. His recommendation now is that if my diesel will start without plugging it in, don't plug it in, especially in the garage. I've been plugging mine in occasionally, not because it needs it, but I figure it will help the engine get up to temp a bit quicker improving economy and cabin heat. Any theories on what happened?
I know what happened. It was a FORD PICKUP. My MIL's husband has had two Ford pickups (one Ranger, one F150) spontaneously catch fire and burn to a crisp. That die-hard Ford lover actually replaced the F150 with a Chevy. I was shocked!
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  #1123  
Old 03-03-2014, 05:19 PM
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Quote:
Originally Posted by chevyboy_711 View Post
Oil analysis is a great tool to see the condition of an engine and how long it's got left. I recently had an oil analysis done on the big truck to check on the bottom end and see if it needs to be overhauled yet. 750k on the clock. CAT says it's good for now. On a smaller (passenger) vehicle, I'd probably have one done if I was worried about something, but other than that, it's kinda overkill. Reason being, most of these engines in passenger cars (gas and diesel) never see the maximum stress load they can handle, even in stock form. Well, unless you tow/haul everyday with passengers inside, through the mountains. But even then, the suspension and driveline are usually the weak point. The engines can handle a bit more. Whereas conversely with heavy trucks (semis), the engines are stressed and pushed to the limit daily. So regular oil analyses are important to see what's up inside.
Many aircraft owners do oil analysis, but not as a one-time affair. It is done at every oil change so you can watch for trends. The trend will help you see if things are starting to go sour before they actually do. IMHO, if you only do it once you are missing a lot of the benefit.
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  #1124  
Old 03-03-2014, 06:46 PM
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Originally Posted by Rexlion View Post
I know what happened. It was a FORD PICKUP. My MIL's husband has had two Ford pickups (one Ranger, one F150) spontaneously catch fire and burn to a crisp. That die-hard Ford lover actually replaced the F150 with a Chevy. I was shocked!
Hmmmm....Ranger and F150 have little in common...except the owner??? Lol. If the Chevy burns....
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  #1125  
Old 03-03-2014, 08:55 PM
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Re: Welcome ALL 2014+ Jeep Grand Cherokee Ecodiesel owners!

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Originally Posted by ExcursionDiesel View Post
Hmmmm....Ranger and F150 have little in common...except the owner??? Lol. If the Chevy burns....
The owner, and the brand.

Yep, I know. Coincidences happen. Some people can have the worst luck. I guess the F150 sprang a fuel leak while idling. They thought the Ranger fire was electrical, but no one could tell for sure as it was sitting (turned off) in a parking lot with no one watching it. I just never thought I'd see the day when ol' Bruce would buy a Chevy pickup. But he still likes Fords.
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  #1126  
Old 03-03-2014, 11:33 PM
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Re: Welcome ALL 2014+ Jeep Grand Cherokee Ecodiesel owners!

This may have been mentioned as I haven't been able to keep up with this long thread...but.., did any of you notice the insane amount of black dust fibers in the glove box and center console from the lining? the amount is really ridiculous! anything I put in there gets covered. When I fist took out my users guide package when it was new the plastic wrapping was filthy with black dust and I don't mean a little...I mean totally covered! . I know it's not a big deal but whatever lining felt material they use is bad!
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  #1127  
Old 03-04-2014, 05:35 PM
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This may have been mentioned as I haven't been able to keep up with this long thread...but.., did any of you notice the insane amount of black dust fibers in the glove box and center console from the lining? the amount is really ridiculous! anything I put in there gets covered. When I fist took out my users guide package when it was new the plastic wrapping was filthy with black dust and I don't mean a little...I mean totally covered! . I know it's not a big deal but whatever lining felt material they use is bad!
Mine was cleeeeeean. Maybe you got an end of the roll lining.
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  #1128  
Old 03-04-2014, 07:55 PM
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Re: Welcome ALL 2014+ Jeep Grand Cherokee Ecodiesel owners!

No fibers or lint here either so agree must have been an anomaly.
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