Long Term 5w-30 use in Honda 1.5t

[picklyrickly1073]

I want to see these cars when they have 200k miles and are 12 years old, they might be oil burners.

Sounds like you’re generalizing

 

[tolian21]

Sounds like you’re generalizing

Nope, there is no long term data on modern Honda DI turbos, so I will run thicker oil until more data is available

 

[picklyrickly1073]

What do you drive?

 

[tolian21]

If you are asking me, Acura RDX 2020 which has 2.0T Honda engine used in accords.
Ive done few UOAs on it

 

[Patman]

Nope, there is no long term data on modern Honda DI turbos, so I will run thicker oil until more data is available

There is plenty of long term data! The Civic has had the 1.5T since 2016 and there are plenty of high mileage examples including one that is almost at 800,000 miles.

 

[Nessism1]

I drive almost all city miles, and when dropping the oil in my Civic at 5000 miles, or even less sometimes, the oil has a very strong gasoline odor. I don't know what % of fuel dilution there is, but I've never smelled oil like this in all my decades of doing oil changes.

 

[tolian21]

I drive almost all city miles, and when dropping the oil in my Civic at 5000 miles, or even less sometimes, the oil has a very strong gasoline odor. I don't know what % of fuel dilution there is, but I've never smelled oil like this in all my decades of doing oil changes.

Its a new honda design that makes engines last 800k miles,

 

[tolian21]

There is plenty of long term data! The Civic has had the 1.5T since 2016 and there are plenty of high mileage examples including one that is almost at 800,000 miles.

To have that many miles in 8 years is not your typical driving. I am operating under caution using thicker grade since lab flagged my UOA with 5% twice. Better safe than sorry

 

[Triple_Se7en]

The title to this thread is a good resolution, while instituting 5k OCIs. The value-priced 5w30s are the thickest cst@100 available at the Group 2+ / Group 3 level. I do believe all of em' start around 11.5cst and hang right around 9.0 (darn near 30w) at the end of the shortened OCI.

Pennzoil Black Label Synthetic
Castrol GTX Synthetic
Supertech / Kirkland Synthetic
Quaker State Synthetic
Mobil Full Synthetic

If I had that Honda and 1.5 engine, I would entertain myself by trying all of those I listed for 3-4k OCIs. Keep the dilution down and enjoy owning & maintaining that otherwise well built and long lasting engine.

 

[picklyrickly1073]

Another quick update on MPG, finally got through a full tank on my normal commute to work and whatever local I do for errands and resulted in 37.2mpg which is pretty much the same as I was seeing on 0w-20

 

[thetricky]

Let’s also not forget that while the boutiques get all the attention for being formulated for long OCI’s, they have also shown to strongly resist the effects of fuel dilution, while maintaining protection. So while it may not go 20k+ mile oci’s, I’d bet they could safely be extended past 5k a bit with no detrimental effects. The top oil that comes to mind is no-vii for this.

 

[kschachn]

Let’s also not forget that while the boutiques get all the attention for being formulated for long OCI’s, they have also shown to strongly resist the effects of fuel dilution, while maintaining protection. So while it may not go 20k+ mile oci’s, I’d bet they could safely be extended past 5k a bit with no detrimental effects. The top oil that comes to mind is no-vii for this.

How do they do that?

 

[Nessism1]

Another quick update on MPG, finally got through a full tank on my normal commute to work and whatever local I do for errands and resulted in 37.2mpg which is pretty much the same as I was seeing on 0w-20

To get 37.2mpg out of a tank, you must be racking up big highway miles, driving at light load. For that use case, the oil won't be stressed regardless of what you use.

 

[picklyrickly1073]

To get 37.2mpg out of a tank, you must be racking up big highway miles, driving at light load. For that use case, the oil won't be stressed regardless of what you use.

No highway, I take all back country roads to work so there’s a good bit of pulse and glide and other techniques adapted from my Prius days where the only fun was seeing how high you could get the MPG number. There are some twisty fun parts of the commute and I do enjoy occasionally opening the car up too. I just try to keep a constant speed and throttle when I can and avoid braking and accelerating which inherently leads to pushing through some of the corners with a bit more haste than your typical commuter. If no one behind me I’m fine losing a few mph going up the hill knowing gravity will give me speed back for free on the other side

 

[thetricky]

How do they do that?

Better base oils, lack of vii’s or higher quality ones correct?

 

[wemay]

Another quick update on MPG, finally got through a full tank on my normal commute to work and whatever local I do for errands and resulted in 37.2mpg which is pretty much the same as I was seeing on 0w-20

That miniscule difference is pretty much the same difference there will be in wear. Is it real? Yes. Is it significant? No. The only real benefit for better wear results would be in stepping up to a Euro 30 or 40 with an HT/HS of 3.5. Not between a 20 and 30 API/ILSAC where the HT/HS difference is usually between 2.6 and 2.9.

 

[Pablo]

Better base oils, lack of vii’s or higher quality ones correct?

Generally less shearing of any type in good base oils and strong VIIs. Looking through the UOA's shows that.

That said, dump 5% fuel in any oil and it will become less viscous by dilution alone.

 

[thetricky]

Generally less shearing of any type in good base oils and strong VIIs. Looking through the UOA's shows that.

That said, dump 5% fuel in any oil and it will become less viscous by dilution alone.

Then minimize that risk with a higher viscosity pick would make sense.

 

[Pablo]

Then minimize that risk with a higher viscosity pick would make sense.

Yes and also take the steps - longer, hotter runs, premium fuel - that minimize fuel in the oil in the first place.

 

[kschachn]

Generally less shearing of any type in good base oils and strong VIIs. Looking through the UOA's shows that.

That said, dump 5% fuel in any oil and it will become less viscous by dilution alone.

Yes this.