Another "High Mileage Synthetic" Question

[XanRules]

Hi folks,

I'll try to keep this short and sweet. I currently have a 2017 Ford Fiesta ST that I've had since new. This car has the 1.6 EcoBoost GDI engine. I have kept up with maintenance and done regular oil changes using whatever fully ynthetic oil I can find that meets factory specs, mostly Penn Platinum (not PUP) though I have also used Mobil 1 and LiquiMoly when deals presented themselves. The factory specs everywhere else in the world are 5w30, in the US it's 5w20 for fuel economy reasons. However, I have been using 5w30 for most of the car's life because it has been modified and I am running just shy of 30lbs of boost and I feel like the extra bit of viscosity can't hurt under those conditions.

The car has officially rolled over 80,000 miles, which I guess technically makes it "high mileage."

Is there any benefit to me switching over to Penn Platinum "High Mileage" or a similar "high mileage" oil, or should I just keep using regular old Penn Platinum or similar? My understanding is that high-mileage oils have more detergents and conditioners to compensate for higher-mileage engines possibly being a little dirtier and seals being a little more worn out, but I have no reason to believe that my engine is particularly dirty as I am quite meticulous with my oil changes and with keeping the engine clean in general (using valve cleaner to get junk off the backs of the valves, running a catch can and breather to catch blow-by, etc).

Thanks in advance!

 

[FTTSHO]

I’ve always thought that if high mileage oils have esters for seal swelling and it slows down the process of seals getting hard and eventually shrinking, then why not just start using High Mileage oil on day one.

Some people say that don’t use high milage oil if you’re not experiencing leaks, but to me that doesn’t make sense.

Can some experts tell me and other people that may be wondering the same thing?

 

[fantastic]

I'd not use it unless you're experiencing leaks and you intend to keep using it.

 

[XanRules]

Good enough for me.

 

[Jay3702]

Yeah, but aren’t you supposed to use high mileage before you start getting leaks? Because once you start getting leaks it’s too late?

 

[kschachn]

Hi folks,

I'll try to keep this short and sweet. I currently have a 2017 Ford Fiesta ST that I've had since new. This car has the 1.6 EcoBoost GDI engine. I have kept up with maintenance and done regular oil changes using whatever fully ynthetic oil I can find that meets factory specs, mostly Penn Platinum (not Pennzoil Ultra Platinum) though I have also used Mobil 1 and LiquiMoly when deals presented themselves. The factory specs everywhere else in the world are 5w30, in the US it's 5w20 for fuel economy reasons. However, I have been using 5w30 for most of the car's life because it has been modified and I am running just shy of 30lbs of boost and I feel like the extra bit of viscosity can't hurt under those conditions.

The car has officially rolled over 80,000 miles, which I guess technically makes it "high mileage."

Is there any benefit to me switching over to Penn Platinum "High Mileage" or a similar "high mileage" oil, or should I just keep using regular old Penn Platinum or similar? My understanding is that high-mileage oils have more detergents and conditioners to compensate for higher-mileage engines possibly being a little dirtier and seals being a little more worn out, but I have no reason to believe that my engine is particularly dirty as I am quite meticulous with my oil changes and with keeping the engine clean in general (using valve cleaner to get junk off the backs of the valves, running a catch can and breather to catch blow-by, etc).

Thanks in advance!

If you wanted an “extra bit” of viscosity you’d be far better off moving up a grade rather than trying to rely on what an High Mileage oil may or may not have.

 

[kschachn]

Yeah, but aren’t you supposed to use high mileage before you start getting leaks? Because once you start getting leaks it’s too late?

You can use it anytime.

 

[Jay3702]

Correct, but if you start leaking oil changing to high mileage is probablynot gonna fix the problem

 

[kschachn]

Correct, but if you start leaking oil changing to high mileage is probablynot gonna fix the problem

Why is that?

 

[Jay3702]

It’s best to start using high mileage oil before you start having issues. Hard to always plan that but 75,000 miles is a safe bet.

 

[cheesepuffs2]

I don’t understand some people’s hesitation to switch to High Mileage. Put me in the camp of “prevention”. I don’t see a drawback to keeping any seals that may be affected by the increase in conditioners more pliable for longer, especially since the High Mileage version of an oil is almost always almost the exact same price.

 

[crashz]

Devils advocate here, but would the esters that swell the rubber components cause longer term degradation of the seal and hose materials? Like turning them gummy?

 

[cheesepuffs2]

Devils advocate here, but would the esters that swell the rubber components cause longer term degradation of the seal and hose materials? Like turning them gummy?

No, because as long as it’s an API rated oil, it has to pass the same seal compatibility tests that “regular” oil does too.