Motor Oil for 2024 Subaru BRZ

[GTR_Hopeful]

I heard about that and also to overfill sump by 1/2 quart or so. Car will will be used for daily and spirited use. There's also the RTV issue.

 

[edyvw]

I heard about that and also to overfill sump by 1/2 quart or so. Car will will be used for daily and spirited use. There's also the RTV issue.

As far as I know, overfilling and some baffle sumps don't work. Generally, on track it is always prudent to overfill a bit, and might save you if not pushing too hard in corners. But, so far only solution seems accu. sump.

 

[GTR_Hopeful]

I'm familiar with running accusumps on Pontiac Trans Ams back in the day for autocross. We always ran a quart over as well.

 

[edyvw]

I'm familiar with running accusumps on Pontiac Trans Ams back in the day for autocross. We always ran a quart over as well.

I run more in my BMW too on track. It is good practice, issues or not.

 

[zeroptzero]

I wouldn't do the 20 wt stuff. I use the Valvoline EP 5W-30 in my 25 GR86 (same vehicle) very high in Moly and Boron.

a 30 weight and high moly sounds like a good mix, I do run Valvoline in my daily driver in their 20 weight synthetic, with high moly.

 

[kschachn]

The manual states that a 30 weight oil can be used if necessary, I think I am okay with the 20 weight as oil flow is important as is fuel economy. These aren't the most economical motors out there in terms of fuel economy. I am glad that they incorporated a dual fuel injection system on this motor to reduce fuel related issues down the road.

Oil flow is irrelevant. As long as the oil can be pumped it will flow. Pumpability is represented by the winter rating.

 

[kschachn]

a 30 weight and high moly sounds like a good mix, I do run Valvoline in my daily driver in their 20 weight synthetic, with high moly.

What is the specific molybdenum compound? That’s important to know since a simple spectrographic analysis does not show this. It was part of the condition for the old TGMO. Not all compounds are equally effective.

 

[JonesZ]

Ravenol MTF 3 is single weight 75. It's what I use in my Mk7.5 GTI since 15k mileage. No issues thus far. 80k now

 

[SiRDOHC]

If you are going to "wring her out" a lot, I'd suggest an Xw-30 in it. Does it have a 6000 mile OCI specified like many of the other Subaru engines in that year?

I run good quality 0w20 oil in a 2024 Forester and change it every 5000 miles since it's so easy to remember, and I'm sure this is sufficient when good oil is used in non-severe service.

Keep a close eye around the filler neck and the underside of the yellow oil fill cap. EVERY SINGLE SUBARU I see at work is filling with dark deposit (crud) in these areas, and I have seen it even as early as 15-20k miles. If its dark up top, I can only imagine what is happening at the rings and other hot spots.

My parents have a low mileage '23 Forester, and I regret not buying one as well (instead of the Rav4 I got) to do a head to head comparison of 0w30 vs 0w20 in these things because my father is too afraid of the warranty bogeyman and insists on 0w20.

 

[kschachn]

Keep a close eye around the filler neck and the underside of the yellow oil fill cap. EVERY SINGLE SUBARU I see at work is filling with dark deposit (crud) in these areas, and I have seen it even as early as 15-20k miles. If its dark up top, I can only imagine what is happening at the rings and other hot spots.

My parents have a low mileage '23 Forester, and I regret not buying one as well (instead of the Rav4 I got) to do a head to head comparison of 0w30 vs 0w20 in these things because my father is too afraid of the warranty bogeyman and insists on 0w20.

Isn’t the filler cap residue due to moisture? I have a hard time believing it’s all that hot nor warm at that location as it would be at an engine hot spot.

 

[zeroptzero]

I wouldn't do the 20 wt stuff. I use the Valvoline EP 5W-30 in my 25 GR86 (same vehicle) very high in Moly and Boron.

The one thing I liked about 20 weight oils is that they have to be full synthetic , no guessing. With 30 weight oils we have to figure out which ones are proper synthetics and which ones may not be. Certainly the extra viscosity is going to help provide more protection though.

 

[Patman]

The one thing I liked about 20 weight oils is that they have to be full synthetic , no guessing.

They make blends that are 0w20 and there are plenty of 5w20s that aren’t full synthetic

 

[thescreensavers]

As far as I know, overfilling and some baffle sumps don't work. Generally, on track it is always prudent to overfill a bit, and might save you if not pushing too hard in corners. But, so far only solution seems accu. sump.

The GR cup cars seem to run M1 0-40 and bit over 1/2 quart overfill https://900brz.com/posts/gr-cup-reliability they also have a cooler and an added baffle though

 

[zeroptzero]

That makes sense, they need all of the protection they can get. I've heard in other parts of the world these cars run 30 weight oil, which we have seen with other makes and models, North America is always different.

 

[kschachn]

Grades listed in the owner's manual are recommendations, not requirements. Any higher grade is acceptable as long as the winter rating is proper for the expected starting temperature.

 

[edyvw]

That makes sense, they need all of the protection they can get. I've heard in other parts of the world these cars run 30 weight oil, which we have seen with other makes and models, North America is always different.

There is no problem running thicker oil.
Goid choice if no track is Castrol Edge 0W30. $37 for 5qt and filter at AAP.

 

[zeroptzero]

Thanks for the added replies, I do like the idea of a 0w-30 for the shoulder seasons , it won't be terribly cold though, so I am sure 5w-30 would also be suitable, the car is stored during winter months when the extreme cold temps occur. Thanks for the added oil suggestion.

 

[SiRDOHC]

Isn’t the filler cap residue due to moisture? I have a hard time believing it’s all that hot nor warm at that location as it would be at an engine hot spot.

Not sure what its cause is, it’s just something I observe on so many of them and something that I wouldn’t like to see on my own car.

 

[kschachn]

Not sure what its cause is, it’s just something I observe on so many of them and something that I wouldn’t like to see on my own car.

The oil cap is typically one of the coolest locations, that's why moisture often condenses there and causes a deposit.

 

[edyvw]

Thanks for the added replies, I do like the idea of a 0w-30 for the shoulder seasons , it won't be terribly cold though, so I am sure 5w-30 would also be suitable, the car is stored during winter months when the extreme cold temps occur. Thanks for the added oil suggestion.

I did not recommend 0W30 Edge bcs. winter. I recommended it bcs. quality.
This is thick W30 oil, with HTHS almost as Mobil1 0W40. It is basically borderline W40 oil and thicker and more shear stable than your average 5W30 ILSAC GF6.
Look for oils that have MB229.5 approval. That will provide you IMO just right HTHS, not too much, not too little, just kinematic and dynamic viscosity in case you are pushing it hard through corners. If tracking, don't think anything below W40 with same MB229.5 and also Porsche A40 approval.