Post your latest oil or filter purchase

[Sequoiasoon]

I just picked up one of 6qt case of individual bottles of Mobil 1 0W-40 for $31.49 from BJ's. Planning for the pre-winter OCI's for generator and snow blower. It's on sale for 3 more days, best price no but cheaper than the 5qt jugs of other stuff.

They both have 5W-30 in them now with almost no hours on generator, just to start it, get it warm under load, storm prep.
Snowblower got some use with the couple storms.

 

[nthach]

Another AutoZone buy:
5qt Valvoline Restore and Protect 5W-30
STP Extended Life PH8A equivalent

 

[Patman]

I grabbed a Carquest Premium oil filter for the Civic. It was $10.99 Canadian ($7.82 US) at Carquest

 

[Magnumdude]

Oil Filters: Amsoil EABP90 (Bypass filter 2 Micron), Amsoil EAO26 (Full flow filter 20 Micron)
Oil: 10 quarts HPL HP SAE 5W40 EURO Synthetic Performance Motor Oil

2018 GMC Sierra 1500 Denali Ultimate trim. 65K miles.

 

[Jpc1623]

From Walmart 2 jugs - Mobil1 0w20 X2

 

[Magnumdude]

I run very short OCIs. My children will inheret my truck and it will be running better when they get it than when I bought it. Other than oil and the transfer case fluid, I change (and flush the coolant and brake fluid) and flush if appropriate all fluids every 30K - severe service schedule+. The transfer case fluid is changed every 20K and I change my oil and both filters every 2500 miles.

 

[tired]

I change my oil and both filters every 2500 miles.

This is pathologic and a big waste.

 

[Patman]

This is pathologic and a big waste.

And that engine would last just as long with 5k intervals and at half the price. He could leave his kids a bigger inheritance instead of just leaving them a tired old truck

 

[Sequoiasoon]

I just picked up one of 6qt case of individual bottles of Mobil 1 0W-40 for $31.49 from BJ's. Planning for the pre-winter OCI's for generator and snow blower. It's on sale for 3 more days, best price no but cheaper than the 5qt jugs of other stuff.

They both have 5W-30 in them now with almost no hours on generator, just to start it, get it warm under load, storm prep.
Snowblower got some use with the couple storms.

View attachment 348077

I was back at BJ's for other stuff wife wanted. I didn't buy any more oil BUT walking by it did jump up $4.50 from yesterday. Still on sale for $35.99 so midweek their original price jumped up.

 

[Wheel366]

Picked up four more. They only had 5.

 

[Hootbro]

Hit up five different Home Depots on the way home from work and scored in 4 of them. Decent mix of Castrol GTX 10W-30 and 10W-40. Found a couple of Castrol Edge HM 5W-30 jugs and a couple loose Pennzoil 10W-40 jug/bottle.

That comes out to 94 quarts total for $57 total cost. That is about 60 cents a quart. They are also starting the reset with Mobil and Quaker State taking over the spots on the shelf.

 

[jml4life]

First time using Restore and Protect in my 316k mile 2007 Pontiac G6. Time to see what all the fuss is about.

 

[Magnumdude]

And that engine would last just as long with 5k intervals and at half the price. He could leave his kids a bigger inheritance instead of just leaving them a tired old truck

I get what you’re saying about wear at one oil change, but there’s another angle that matters more if the goal is a truck that still runs strong at 250k–300k miles.

When you drain the oil you never get it all out. There’s always some left in the pan, passages, cooler, and filter housing — usually 5–20% or so. That residual oil mixes with the new fill.

With a 5K interval, the oil you leave behind has already seen 5,000 miles of real engine time (heat, oxidation, additive depletion). You add fresh oil, but some of that new oil then becomes the residual for the next 5K change. Over 10 years, portions of the oil in the engine can end up with 8–12+ years of cumulative engine time on them, even though you’re technically changing it every 5,000 miles.

With a 2,500-mile interval you’re doing a bigger partial refresh more often, so the average age of the oil that stays in the engine stays lower over the long haul.

I’m not saying a 5K interval will kill an engine. I’m just saying that keeping the average age of the oil lower gives you the best shot at minimum cumulative stress and deposits over many years.

Different goals, different approach. If 5K works for you and you’re happy with it, that’s fine. I’m just optimizing for the longest possible engine life, not the lowest cost per mile.

 

[tired]

I get what you’re saying about wear at one oil change, but there’s another angle that matters more if the goal is a truck that still runs strong at 250k–300k miles.

When you drain the oil you never get it all out. There’s always some left in the pan, passages, cooler, and filter housing — usually 5–20% or so. That residual oil mixes with the new fill.

With a 5K interval, the oil you leave behind has already seen 5,000 miles of real engine time (heat, oxidation, additive depletion). You add fresh oil, but some of that new oil then becomes the residual for the next 5K change. Over 10 years, portions of the oil in the engine can end up with 8–12+ years of cumulative engine time on them, even though you’re technically changing it every 5,000 miles.

With a 2,500-mile interval you’re doing a bigger partial refresh more often, so the average age of the oil that stays in the engine stays lower over the long haul.

I’m not saying a 5K interval will kill an engine. I’m just saying that keeping the average age of the oil lower gives you the best shot at minimum cumulative stress and deposits over many years.

Different goals, different approach. If 5K works for you and you’re happy with it, that’s fine. I’m just optimizing for the longest possible engine life, not the lowest cost per mile.

If only there was this website with lots of motor oil enthusiasts with long term experience with different oils, intervals, etc. and you could talk to people and learn from their experience that 5k and even 10k with the right oil, engine, and use case can still lead to a long engine life. We’ve even had people doing 25,000 mile intervals. If only…

 

[OS4A]

I get what you’re saying about wear at one oil change, but there’s another angle that matters more if the goal is a truck that still runs strong at 250k–300k miles.

When you drain the oil you never get it all out. There’s always some left in the pan, passages, cooler, and filter housing — usually 5–20% or so. That residual oil mixes with the new fill.

With a 5K interval, the oil you leave behind has already seen 5,000 miles of real engine time (heat, oxidation, additive depletion). You add fresh oil, but some of that new oil then becomes the residual for the next 5K change. Over 10 years, portions of the oil in the engine can end up with 8–12+ years of cumulative engine time on them, even though you’re technically changing it every 5,000 miles.

With a 2,500-mile interval you’re doing a bigger partial refresh more often, so the average age of the oil that stays in the engine stays lower over the long haul.

I’m not saying a 5K interval will kill an engine. I’m just saying that keeping the average age of the oil lower gives you the best shot at minimum cumulative stress and deposits over many years.

Different goals, different approach. If 5K works for you and you’re happy with it, that’s fine. I’m just optimizing for the longest possible engine life, not the lowest cost per mile.

Be you

Gotta admire commitment to a process. Thats a trait sorely missing in today's world.

 

[Patman]

I get what you’re saying about wear at one oil change, but there’s another angle that matters more if the goal is a truck that still runs strong at 250k–300k miles.

When you drain the oil you never get it all out. There’s always some left in the pan, passages, cooler, and filter housing — usually 5–20% or so. That residual oil mixes with the new fill.

With a 5K interval, the oil you leave behind has already seen 5,000 miles of real engine time (heat, oxidation, additive depletion). You add fresh oil, but some of that new oil then becomes the residual for the next 5K change. Over 10 years, portions of the oil in the engine can end up with 8–12+ years of cumulative engine time on them, even though you’re technically changing it every 5,000 miles.

With a 2,500-mile interval you’re doing a bigger partial refresh more often, so the average age of the oil that stays in the engine stays lower over the long haul.

I’m not saying a 5K interval will kill an engine. I’m just saying that keeping the average age of the oil lower gives you the best shot at minimum cumulative stress and deposits over many years.

Different goals, different approach. If 5K works for you and you’re happy with it, that’s fine. I’m just optimizing for the longest possible engine life, not the lowest cost per mile.

I’m well aware of the fact that some old oil gets left behind. It’s not like I’m hearing this for the first time. And despite that, I’m still fully comfortable to do 10,000 mile oil changes in my Civic (which is approaching 200k soon). We have a few members on here who have successfully done 10k intervals with a few cars and have gotten very high mileage out of them as well. So there’s that…

 

[ZeeOSix]

With a 5K interval, the oil you leave behind has already seen 5,000 miles of real engine time (heat, oxidation, additive depletion). You add fresh oil, but some of that new oil then becomes the residual for the next 5K change. Over 10 years, portions of the oil in the engine can end up with 8–12+ years of cumulative engine time on them, even though you’re technically changing it every 5,000 miles.

If you changed oil once per year for 10 years and there was 5% of 5 qts left behind (0.25 qt), then theoretically the residual oil left from the first oil change would only be 0.05^10 = 0.000000000000098%. The oil left behind from 3 previous OCIs would still be only 0.000125%. Even leaving 5% behind from the last OCI isn't going to hurt anything. Some auto makers recommend changing the oil filter every other OCI, so that would add even more oil left behind.

 

[CleanSump]

Statistically significant. No quantitative data, just speculation. Not my money being wasted so

 

[4wd]

Oil Filters: Amsoil EABP90 (Bypass filter 2 Micron), Amsoil EAO26 (Full flow filter 20 Micron)
Oil: 10 quarts HPL HP SAE 5W40 EURO Synthetic Performance Motor Oil

2018 GMC Sierra 1500 Denali Ultimate trim. 65K miles.

I don’t know of any case of extreme PM beyond this.
With that filter setup and boutique oil (+2 quarts over stock) just running to the OLM limit would not produce any additional wear …