Post your latest oil change

[ripcord]

Mixing oils of different chemistries is probably the worst thing you can do.

Not even close to the worst and probably inconsequential.

 

[The Critic]

Not even close to the worst and probably inconsequential.

Strongly disagree. Amsoil 0W-30 EOT is a low to mid saps oil while M1 0W40 is a full saps oil. Very different chemistries and the resulting performance of the end mix is hard to predict.

 

[Patman]

Mixing oils of different chemistries is probably the worst thing you can do.

He won’t listen. What he is doing makes no sense whatsoever. He thinks he’s a master chemist but in reality he’s making things worse, not better

 

[RyanY]

Mixing oils of different chemistries is probably the worst thing you can do.

Gosh, I've been using frankenblends off and on for many years!

I am not a chemist and certainly do not mean to sound pejorative, and blends are probably not quite as good as sticking to one brand/formulation forever, but is evidence available to suggest that problems arise from mixing oils with the same approvals (e.g., increased wear, sludge, varnish, precipitates, etc)? Also, is it worth flushing and "rinsing" the old oil if switching brands? Or is my car/engine likely to die from other issues before any oil-related wear/contamination problems arise?

 

[ATex7239]

140k oil change, ~6000 mile OCI
2011 Kia Forte.2.0
5W20 Valvoline high mileage
Purolator PL14459 filter
Oh, I write the mileage and date on the driver side strut tower along with the socket size of the drain plug since I have a helluva time remembering

There are plenty of apps you can download on your phone to track maintenance which make this way easier. You can also add multiple vehicles, pics, notes, and various maintenance items not just oil changes. Unless you just enjoy going outside and looking under your hood to figure out what to do.

 

[ATex7239]

Gosh, I've been using frankenblends off and on for many years!

I am not a chemist and certainly do not mean to sound pejorative, and blends are probably not quite as good as sticking to one brand/formulation forever, but is evidence available to suggest that problems arise from mixing oils with the same approvals (e.g., increased wear, sludge, varnish, precipitates, etc)? Also, is it worth flushing and "rinsing" the old oil if switching brands? Or is my car/engine likely to die from other issues before any oil-related wear/contamination problems arise?

On the notorious Hyundai 2.4: quite possibly and high probability an engine defect would take it out first.

 

[The Critic]

Gosh, I've been using frankenblends off and on for many years!

I am not a chemist and certainly do not mean to sound pejorative, and blends are probably not quite as good as sticking to one brand/formulation forever, but is evidence available to suggest that problems arise from mixing oils with the same approvals (e.g., increased wear, sludge, varnish, precipitates, etc)? Also, is it worth flushing and "rinsing" the old oil if switching brands? Or is my car/engine likely to die from other issues before any oil-related wear/contamination problems arise?

Mixing two full-SAPS Euro formulations (e.g. M1 0W40 and Castrol 0W40) or two Dexos 1 Gen 3 approved formulas (e.g. M1 5W30 and PP 5W30) is theoretically tolerable but not ideal.

In this case, mixing two entirely different types of oils with very different anti-wear additive systems is a needless risk.

 

[Triple_Se7en]

Mixing oils of different chemistries is probably the worst thing you can do.

My engines get sold and re-used 20 years after I purchased the vehicle new - after I'm forced to drive the vehicle to a junkyard, due to dangerous rust.
I've been franken-blending since 1970....... that's 55 years and not even a speck exists, of doing anything wrong in that regard.

So you're not only wrong - you're 100% wrong. But to put your mind at ease, let me say I never go beyond a 4k OCI in those 55 years either. So that's makes my world of blending oils a-lot easier for my engines to digest in a positive manner. My engines have never smoked or consumed oil beyond a single quart in those 4k OCIs covering 50 years. I never even had to change a lifter or valve cover gasket.

There's really nothing to debate about this Mr. Critic. Being first and last owner of all those vehicles proves it works just fine and dandy.
Happy New Year to you Sir.

 

[Patman]

My engines get sold and re-used 20 years after I purchased the vehicle new - after I'm forced to drive the vehicle to a junkyard, due to dangerous rust.
I've been franken-blending since 1970....... that's 55 years and not even a speck exists, of doing anything wrong in that regard.

So you're not only wrong - you're 100% wrong. But to put your mind at ease, let me say I never go beyond a 4k OCI in those 55 years either. So that's makes my world of blending oils a-lot easier for my engines to digest in a positive manner. My engines have never smoked or consumed oil beyond a single quart in those 4k OCIs covering 50 years. I never even had to change a lifter or valve cover gasket.

There's really nothing to debate about this Mr. Critic. Being first and last owner of all those vehicles proves it works just fine and dandy.
Happy New Year to you Sir.

What you’re doing makes no sense at all. There is no logical reason to be mixing oils unless you’re using up old stuff on hand. What exactly are you trying to accomplish? I’m sure HPL would come up with a custom blend if you feel there isn’t an existing oil on the market for you.

 

[The Critic]

My engines get sold and re-used 20 years after I purchased the vehicle new - after I'm forced to drive the vehicle to a junkyard, due to dangerous rust.
I've been franken-blending since 1970....... that's 55 years and not even a speck exists, of doing anything wrong in that regard.

So you're not only wrong - you're 100% wrong. But to put your mind at ease, let me say I never go beyond a 4k OCI in those 55 years either. So that's makes my world of blending oils a-lot easier for my engines to digest in a positive manner. My engines have never smoked or consumed oil beyond a single quart in those 4k OCIs covering 50 years. I never even had to change a lifter or valve cover gasket.

There's really nothing to debate about this Mr. Critic. Being first and last owner of all those vehicles proves it works just fine and dandy.
Happy New Year to you Sir.

Just because you have experienced zero issues with your limited sample size does not equate to a scientifically validated best practice.

Agree to disagree.

 

[JeffKeryk]

2019 CR-V EX-L, 75K, 6,300 OCI
Out: M1 0w20
In: QS Ultimate 0w20

Left Honda filter for next time.
Aired up tires and checked all fluids.

 

[XJRiver]

What you’re doing makes no sense at all. There is no logical reason to be mixing oils unless you’re using up old stuff on hand. What exactly are you trying to accomplish? I’m sure HPL would come up with a custom blend if you feel there isn’t an existing oil on the market for you.

What he's doing is lubricating the engine with clean oil. It's not a problem. And while I've never hesitated pouring in any type of decent brand motor oil, I probably would be more disciplined if I drove a red Corvette.

 

[Sandstorm]

My engines get sold and re-used 20 years after I purchased the vehicle new - after I'm forced to drive the vehicle to a junkyard, due to dangerous rust.
I've been franken-blending since 1970....... that's 55 years and not even a speck exists, of doing anything wrong in that regard.

So you're not only wrong - you're 100% wrong. But to put your mind at ease, let me say I never go beyond a 4k OCI in those 55 years either. So that's makes my world of blending oils a-lot easier for my engines to digest in a positive manner. My engines have never smoked or consumed oil beyond a single quart in those 4k OCIs covering 50 years. I never even had to change a lifter or valve cover gasket.

There's really nothing to debate about this Mr. Critic. Being first and last owner of all those vehicles proves it works just fine and dandy.
Happy New Year to you Sir.

Just because you're doing it since time immemorial doesn't make it the correct thing to do. Mixing different chemistries is not scientifically sound.

 

[RyanY]

Mixing two full-SAPS Euro formulations (e.g. M1 0W40 and Castrol 0W40) or two Dexos 1 Gen 3 approved formulas (e.g. M1 5W30 and PP 5W30) is theoretically tolerable but not ideal.

In this case, mixing two entirely different types of oils with very different anti-wear additive systems is a needless risk.

That makes sense. I interpreted your statement as referring to all types of mixing.

 

[Kennedy01]

2000 Buick LeSabre
3.8 V6
Out: unknown oil, Fram Tough Guard TG3387A filter
In: Swepco 306 15w40, AcDelco PF47E filter

2005 Ford Expedition
5.4 V8
Out: Mobil 1 High Mileage 10w40, Fram Extra Guard PH2 filter
In: Swepco 306 15w40, Motorcraft FL820S filter

 

[Oliveoil2]

It’s more important to have an engine full of oil than to worry about different blends. Been mixing oils for years.

 

[OilyOrangutan]

2010 Toyota Corolla S w/ the 1.8L. Our FOREVER Car. It just keeps going!
331793 KM Total
6 Month / 6714KM (4172 Miles) OCI
Out Valvoline R&P 5W-30 and a FE10358
In Valvoline R&P 5W-30 and an (OG?) XG10358

Dirty Engine Bay, but that is life. Also this is the 2nd of 4 OCI's using Valvoline R&P. I can say this drain was WAY darker then usual. I would ASSUME it is doing some cleaning but I can't be sure. Sent a sample off to OA.

 

[53' Stude]

2022 Ford f-150 as our works new scrap/errand truck.

Out/off: probably NAPA oil and NAPA 57502 filter

In/on: Safety Kleen 5w30 synthetic DEXOS 1 GEN3 5w30 oil and a PROTEC 57045


Has the 3.5 engine and 40k on it. Will cut filter tomorrow as looks like oil and filter had 6k on them.

 

[cheesepuffs2]

My engines get sold and re-used 20 years after I purchased the vehicle new - after I'm forced to drive the vehicle to a junkyard, due to dangerous rust.
I've been franken-blending since 1970....... that's 55 years and not even a speck exists, of doing anything wrong in that regard.

So you're not only wrong - you're 100% wrong. But to put your mind at ease, let me say I never go beyond a 4k OCI in those 55 years either. So that's makes my world of blending oils a-lot easier for my engines to digest in a positive manner. My engines have never smoked or consumed oil beyond a single quart in those 4k OCIs covering 50 years. I never even had to change a lifter or valve cover gasket.

There's really nothing to debate about this Mr. Critic. Being first and last owner of all those vehicles proves it works just fine and dandy.
Happy New Year to you Sir.

What is the goal of your oil blending versus using an oil off the shelf as-is?

 

[Mewbs]

What is the goal of your oil blending versus using an oil off the shelf as-is?

He's a strange one, even going as far to mixing boutique oils with over the counter oils which defeats their intended purpose. Don't think you can lead this horse to water, even though many here have argued and debated him not to do so.