Question about OCIs and conventional/synthetic oil

[CZ75]

If a person has their oil changed at Valvoline Quick Change or Jiffy Lube, is it better for the vehicle to have the oil changed every 5K miles using full synthetic or every 3K miles using conventional and synthetic blend oil?

The car in question has direct injection and is driven in a mix of city and highway.

 

[SC Maintenance]

The fewer times Jiffy lubed touched it the happier I would be. Personally.

 

[CZ75]

The fewer times Jiffy lubed touched it the happier I would be. Personally.

What's your opinion to the question if Valvoline Quick Change was used?

 

[SC Maintenance]

What's your opinion to the question if Valvoline Quick Change was used?

The Toyota dealer even screwed my wife's up a couple times. Nothing earth ending, but not to spec. Way overfilled a couple times. Forgot to change it at all another. Damaged the air filter another.

The only location I might actually trust would be an indy mechanic I knew personally. Other than that - my opinion is the same irrelevant of the shop.

I am sure there are some good Jiffy lube techs out there, but most aren't, and most are way too rushed.

 

[Propflux01]

5K full syn is your best bet.

 

[dnewton3]

The better choice would be whichever costs the least, because at 5k miles or less, no oil is going to have any substantial advantage over another. (This is assuming the lubes considered are properly spec'd for the application).

 

[TurboZedd-R]

Any API synthetic changed at a reasonable interval ie. 5k is fine. However, not changing your oil, ever, is probably safer than a Jiffy Lube.

 

[CZ75]

The better choice would be whichever costs the least, because at 5k miles or less, no oil is going to have any substantial advantage over another. (This is assuming the lubes considered are properly spec'd for the application).

A part of me wonders is 3K OCI with conventional is better than 5K with synthetic because it gets dirt, grime, carbon, and gas by blow by out of the engine sooner.

 

[OilStainedNapkin]

No difference imo. You’re likely throwing away good oil at 3k even though it’s a syn blend/bulk oil

 

[Nessism1]

Depends on the engine. Some are hard on oil, others no. Sticking rings? Turbo's run hot, so synthetic is the safe play with those.

 

[Propflux01]

A part of me wonders is 3K OCI with conventional is better than 5K with synthetic because it gets dirt, grime, carbon, and gas by blow by out of the engine sooner.

Keep in mind every time you change oil you get a bit of dry start, and some of the additives that 'plate' to metals wash away and have to 'plate' all over again.

 

[CZ75]

Depends on the engine. Some are hard on oil, others no. Sticking rings? Turbo's run hot, so synthetic is the safe play with those.

My car isn't a turbo and doesn't have an oil temp gauge, so I don't know how hot the oil is getting. I don't know if turbos typically have oil temp gauges.

 

[Patrick0525]

Assuming cost is not an issue and there is no oil consumption, HPL every 10k and an oil filter every 5k with visual inspection until there is no carbon debris in the filter media. Unless brand new most cars are not in an immaculate engine cleanliness condition and therefore require extensive pre-treatment (HPL 30EC, multiple 1K filter changes) before getting to the state for a HPL 10k oil change.

 

[Sequoiasoon]

Do a couple of each and send in a used oil sample. 6K/12 months on semi-syn in a short tripped '21 Tucson was seriously diluted, disgusting looking and smelling. I swapped that to full syn at 3k/6 months.

High wear metals and fuel dilution on a short tripped GDI Pilot at ~7500k with full syn from UOA. Now doing 5k's

 

[wlk]

Conventional/Blend at 3/5k would be fine.

 

[Jetronic]

My car isn't a turbo and doesn't have an oil temp gauge, so I don't know how hot the oil is getting. I don't know if turbos typically have oil temp gauges.

turbo cars typically have oil coolers, that keep the oil temp closer to the coolant temp. Not perfect, but better than not having it. I'm sure it's changing, but NA cars typically didn't have the oil coolers, except for performance oriented models

 

[wemay]

At 3k miles, any current API, like Valvoline's Daily Protection, would suffice.

VIOC markets this as a Conventional, but when buying this product for yourself, it's labeled a Blend.

 

[Triple_Se7en]

How about mentioning what year, make, model and engine of this mystery vehicle?
(for example.... If it's a Hyundai or Kia, our opinions may change.

 

[JavierH19]

I watched a short video of some guy talking smack about the customer not wanting to pay extra for fixing a leak and the dumb oil changer put the socket on the drain bolt and started tightening it instead of loosening it and likely stripped the bolt and the guy recording said to loosen once he saw what he was doing. And that is why i don't go to quik loob places for anything.

But to answer your question yes those intervals are fine but I'd rather bring my oil of choice and go to a local shop as they're not likely to have some drop out that doesn't know his left and right screw something up. I'd probably get castrol EP 5w-30 which is rated for 25k but change it by the 10k mark.

 

[nomas]

It would have been better if you had just asked about oil and OCI's . Mentioning a quick lube place just makes people go bananas .