18 5.3 Oil Change interval

[gone_fishing]

I have always followed the OLM down to around 5% or so. This is where you usually get the "change oil soon" message. Usually comes out to around 7,300 miles. I have primarily used Mobil 1 in 0W-20 AFE but also 0W-20 EP, 0W-30 AFE and standard 5W-30. I have had a few UOA's done from Blackstone and have never seen any issues.

 

 

[rkj__]

10 minutes ago, gone_fishing said:

I have always followed the OLM down to around 5% or so. This is where you usually get the "change oil soon" message. Usually comes out to around 7,300 miles. I have primarily used Mobil 1 in 0W-20 AFE but also 0W-20 EP, 0W-30 AFE and standard 5W-30. I have had a few UOA's done from Blackstone and have never seen any issues.

 

 

So many people seem to base their oil change intervals on no factual scientific  information at all, then proclaim to the rest of the world, they should do the same. 

 

I always like when people chime in with some test reports.

[amxguy1970]

2 hours ago, TXGREEK said:

I absolutely agree with you except for the changing at 6500 mile interval. The majority of these synthetic blended oils are maxed out at meeting minimum requirements. IMHO, Over the counter oils should be changed no later than 5000 miles of normal highway use, sooner for lots of idling and stop n go traffic and depending on where you live you should look into the type of protective additives that are in the oil you’re currently using. Over the counter oils ONLY meet MINIMUM REQUIREMENTS, that’s it. There are other oils that are engineered to far surpass the minimum requirements, I’d recommend EVERYONE do their best at doing their own independent research and you may just be shocked at the very small cost difference between the two, over the counter and high end oils that are engineered to far surpass the minimum requirements


Sent from Above

What information do you have that shows 5k tops on oil? I follow bobs the oil guy forums and there are thousands of people on there that have UOA's on all the different brands, I have yet to see anything from the big brands on their synthetics that won't comfortably last 7500. 

 

What is over the counter oil? Let me guess, anything that isn't Amsoil you would say can't last past 5k am I right? 

 

One quote from a member on there: "

Based on UOAs at every OCI, the M1 5W-30 in my 132,000 mile MS3 and the M1 0W-40 in my 159,000 mile X3 can both go at least 10,000 miles. And note that the MS3 motor is DI and turbocharged. Follow the factory OCI and rest easy." 

 

Not sure how those tests came back so positive when it is Mobil 1 and not Amsoil...

 

OP, 3500 is early, not that it is bad just wasted money when you add it up over the life of the truck. Follow the OLM and change when you feel comfortable. When mine gets below 20% I start getting ready for a change. A good name brand Synthetic will more than suffice.

 

Tyler

[ullose272]

What information do you have that shows 5k tops on oil? I follow bobs the oil guy forums and there are thousands of people on there that have UOA's on all the different brands, I have yet to see anything from the big brands on their synthetics that won't comfortably last 7500. 
 
What is over the counter oil? Let me guess, anything that isn't Amsoil you would say can't last past 5k am I right? 
 
One quote from a member on there: "
Based on UOAs at every OCI, the M1 5W-30 in my 132,000 mile MS3 and the M1 0W-40 in my 159,000 mile X3 can both go at least 10,000 miles. And note that the MS3 motor is DI and turbocharged. Follow the factory OCI and rest easy."    Not sure how those tests came back so positive when it is Mobil 1 and not Amsoil...   OP, 3500 is early, not that it is bad just wasted money when you add it up over the life of the truck. Follow the OLM and change when you feel comfortable. When mine gets below 20% I start getting ready for a change. A good name brand Synthetic will more than suffice.  
Tyler

Thank you, modern oils and modern engines are far superior to what was around 20 years ago. Also remember that your truck now takes 8 quarts of oil instead of 5-6. The oil gets less contaminated that way and suffers less thermal breakdown.

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[Grumpy Bear]

1 hour ago, rkj__ said:

So many people seem to base their oil change intervals on no factual scientific  information at all, then proclaim to the rest of the world, they should do the same. 

 

I always like when people chime in with some test reports.

 

UOA is useful for detecting problems when trends break or you find fuel or moisture or antifreeze or pending failure like timing chain tensioners.... I do them on occasion but find cylinder leak down testing, vacuum, PCV cfm volume and oil pressure  pretty valuable in process scientific tools. The most dependable tool is the post mortem tear down and I've done enough past motors I've owned from the 'get' to have a pretty good idea how long and what products. No test is predictive. It's a look in the rear view mirror.

 

I would find UOA's more useful if they reported both TBN and TAN instead of randomly reporting TBN alone. The base number drops and the acid number rises. When they cross it's time to change no matter what the TBN is. Simply saying >1 is a dangerous assumption regardless of how much 'universal' data you have. 

 

The 'world' can do as it pleases. I do share what I use and how I use it but I don't insist anyone pay it any attention at all. 

 

5K OCI is my 'personal' hard limit for 'true' synthetics and 2.5K for conventional.

 

 

[Ed S]

55 minutes ago, amxguy1970 said:

What information do you have that shows 5k tops on oil? I follow bobs the oil guy forums and there are thousands of people on there that have UOA's on all the different brands, I have yet to see anything from the big brands on their synthetics that won't comfortably last 7500. 

 

What is over the counter oil? Let me guess, anything that isn't Amsoil you would say can't last past 5k am I right? 

 

One quote from a member on there: "

Based on UOAs at every OCI, the M1 5W-30 in my 132,000 mile MS3 and the M1 0W-40 in my 159,000 mile X3 can both go at least 10,000 miles. And note that the MS3 motor is DI and turbocharged. Follow the factory OCI and rest easy." 

 

Not sure how those tests came back so positive when it is Mobil 1 and not Amsoil...

 

OP, 3500 is early, not that it is bad just wasted money when you add it up over the life of the truck. Follow the OLM and change when you feel comfortable. When mine gets below 20% I start getting ready for a change. A good name brand Synthetic will more than suffice.

 

Tyler

I received a letter from GM. Due to early vacuum pump failures, GM is recommending not following the "recommended" oil change intervals published. 5000 or less max on changes. 

[Grumpy Bear]

1 hour ago, Ed S said:

I received a letter from GM. Due to early vacuum pump failures, GM is recommending not following the "recommended" oil change intervals published. 5000 or less max on changes. 

 

It's amazing how many people think protection is the only thing oil does. Seems cleaning and cooling is important too, eh?

[TXGREEK]

What information do you have that shows 5k tops on oil? I follow bobs the oil guy forums and there are thousands of people on there that have UOA's on all the different brands, I have yet to see anything from the big brands on their synthetics that won't comfortably last 7500. 

 

What is over the counter oil? Let me guess, anything that isn't Amsoil you would say can't last past 5k am I right? 

 

One quote from a member on there: "

Based on UOAs at every OCI, the M1 5W-30 in my 132,000 mile MS3 and the M1 0W-40 in my 159,000 mile X3 can both go at least 10,000 miles. And note that the MS3 motor is DI and turbocharged. Follow the factory OCI and rest easy."    Not sure how those tests came back so positive when it is Mobil 1 and not Amsoil...   OP, 3500 is early, not that it is bad just wasted money when you add it up over the life of the truck. Follow the OLM and change when you feel comfortable. When mine gets below 20% I start getting ready for a change. A good name brand Synthetic will more than suffice.  

Tyler

 

I didn’t bring up Amsoil, you did. I used to use Mobil1 Annual Protection, found absolutely NOTHING wrong with it, my choice to switch from Mobil1 was simple, anyone and everyone should look at the KEY COMPONENTS to what is in oil that protects better than the other.

 

The key ingredients in oil which protects against viscosity, wear and tear on an engine are? Once you find this out then look to see which oil has the most of it, this how I’ve come to my choice of the king of Protection and not what meets minimum requirements.

 

If you’re happy with what you use, that’s great but for me and many others, I want the maximum protection for all my engines and not what meets but what exceeds in all the above.

 

Good luck and to all, HAPPY HOLIDAYS!

 

 

Sent from Above

 

[TXGREEK]

I have always followed the OLM down to around 5% or so. This is where you usually get the "change oil soon" message. Usually comes out to around 7,300 miles. I have primarily used Mobil 1 in 0W-20 AFE but also 0W-20 EP, 0W-30 AFE and standard 5W-30. I have had a few UOA's done from Blackstone and have never seen any issues.
 
 

That’s great, now try comparing this same amount of mileage using Amsoil Signature Series and then compare the two. Better yet, try running 10K miles on Amsoil Signature Series, then compare the two.

My recommendation is for EVERYONE to use what they can afford and what works best for them, don’t take my word for it. Mobil1 Annual Protection is an excellent oil, I just want the maximum protection available between my oci’s.


Sent from Above

[TXGREEK]

Choosing oil is somewhat like choosing paint, you get what you pay for and in the end it’s the protection you’re getting during use that makes all the difference.


Sent from Above

[Mandalorian]

7 hours ago, TXGREEK said:

I absolutely agree with you except for the changing at 6500 mile interval. The majority of these synthetic blended oils are maxed out at meeting minimum requirements. IMHO, Over the counter oils should be changed no later than 5000 miles of normal highway use, sooner for lots of idling and stop n go traffic and depending on where you live you should look into the type of protective additives that are in the oil you’re currently using. Over the counter oils ONLY meet MINIMUM REQUIREMENTS, that’s it. There are other oils that are engineered to far surpass the minimum requirements, I’d recommend EVERYONE do their best at doing their own independent research and you may just be shocked at the very small cost difference between the two, over the counter and high end oils that are engineered to far surpass the minimum requirements


Sent from Above

I wasn't talking about blends, just full synthetic. There is absolutely no reason to use a blend. A 5qt jug of full synthetic is like $3 more than a blend. 

[TXGREEK]

I wasn't talking about blends, just full synthetic. There is absolutely no reason to use a blend. A 5qt jug of full synthetic is like $3 more than a blend. 

Full Synthetic is NOT 100% Synthetic, it’s conventional oil blended with 100% synthetic additives, 100% synthetic will say 100% synthetic and nothing else. It’s in the additives that’s the #1 to look out for, the protection/boost etc that are the key ingredients.

The problem here is that NO ONE knows what they’re buying and putting into their engines, either it’s what’s on sale or the amount poured into advertisement companies being paid millions to research find ways to get everyone to buy their products. There’s an enormous amount of money being poured into the television and celebrities.

Buy whatever makes you happy, just know the truth. Ok, I’m outta here, good luck to OP!


Sent from Above

[Black02Silverado]

On 11/13/2019 at 2:20 AM, dclayton said:

 

Bought a used 2018 with the 5.3l with 24000 miles, had first oil change done at the dealer today and the sticker they put on the window recommends the next one in 3500k miles, seems a little soon to me...am I wrong in thinking that?

 

Thanks for your thoughts.

 

 

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As you can see there are various thoughts on when to change the oil.  3,500 miles is really early and a way for the dealer to make money. If it part of your oil changes that you have courtesy of the dealership then by all means take advantage of it. 

 

Having an 8qt sump the oil doesn't get as bad as an engine with a 5 to 6 qt sump would in the same amount of time.  If you follow your owners manual all will be fine.

 

5k mile changes are good and keeps everything easy to remember the interval and to include tire rotations.

 

Same would go following the OLM.  Various choices, make one that you feel most comfortable with.

[Grinkly]

I've a 2018 5.3 Eco and when I bought it it came with warranty and free oil changes for life.  The dealer uses Mobil 1 Dexos 0w20 and the dealer's recommend change interval is 7,500 miles or when the DIC shows 20% or less.  This is all that is required to satisfy GM's warranty.

 

Fwiw I'm onto my 12th or 13th Chevy (that's chevy alone lol), I've had them go over 200K with no issues (and little maintenance) and I've had engine's blow at 45K with perfect maintenance, in the end it beats me, that's why I drive a Shipoopi BLT

 

[KARNUT]

I've a 2018 5.3 Eco and when I bought it it came with warranty and free oil changes for life.  The dealer uses Mobil 1 Dexos 0w20 and the dealer's recommend change interval is 7,500 miles or when the DIC shows 20% or less.  This is all that is required to satisfy GM's warranty.

 

Fwiw I'm onto my 12th or 13th Chevy (that's chevy alone lol), I've had them go over 200K with no issues (and little maintenance) and I've had engine's blow at 45K with perfect maintenance, in the end it beats me, that's why I drive a Shipoopi BLT [emoji4]

 

You wouldn’t have too much to worry about. According to your numbers you’re really old or drive a lot.

 

 

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