Recommend a thick 10w-30

[Abax25]

My engine calls for 10w30, and that’s all I use. It is a turbocharged performance car from the 90s, with no emissions. Mainly an auto cross toy, but I do drive it to events. So I have never looked at actual racing oils.

I’ve just used Mobil 1 synthetic 10w30. It shears out of the 30 weight range pretty quickly, and my valvetrain will also get noisy within 1,500 miles. It does see hard use, and I should probably be looking into a better oil more suited for a car that is seeing mainly abuse.

Any recommendations for something that holds a 30 weight better, or is on the thicker side of the 30 weight range?

 

[OVERKILL]

Are you sure it is shear and not just fuel dilution? That's pretty common with forced induction engines as the tunes tend to be a bit rich. I'd probably step up to an xW-40 or go with a heavier 5w30/10w-30 like something from Redline.

 

[Abax25]

Are you sure it is shear and not just fuel dilution? That's pretty common with forced induction engines as the tunes tend to be a bit rich. I'd probably step up to an xW-40 or go with a heavier 5w30/10w-30 like something from Redline.

You’re correct. Slight dilution, but nothing scary. Redline I would need to order, and prefer something I can just find at a local store.

The people I race with, have recommend diesel oils. Not sure I feel comfortable with that.

 

[BeerCan]

Hdeo would probably work fine. Also m1 or castrol 0w40 from Walmart would be good choices.

 

[aquariuscsm]

If you want a conventional,Pennzoil High Mileage 10w30's viscosity is 11.8 @ 100C.

 

[4wd]

Hdeo would probably work fine. Also m1 or castrol 0w40 from Walmart would be good choices.

Think Delo is about the cheapest 10w30 HDEO from the big names

 

[Bryanccfshr]

Why not Mobil 1 High Mileage 10w30 it has an HTHS if 3.5?

 

[Shel_B]

I'd consider This, This, or This.
(Hope I did the links correctly ... should be three 0W-40 oils)

 

[mahanddeem]

Mobil 1 0w40

 

[Jetronic]

I would say Total quartz 9000 energy 0w30. 3.5mpas hths viscosity. Or any other xw30 meeting ACEA A3/B4. 0W is preferred for the higher synthetic component if you haven't a clue about other specs like Noack or flash point which are also an indication of base oil viscosity.

 

[Sam_Julier]

Any A3/B4 spec oil has a minimum 3.5 HTHSvis. Delo XLE, Rotella T4, T5 etc are at 3.6-3.6 HTHSvis.

 

[gfh77665]

SAE 30.

 

[OilReport99]

T4 10w30

 

[SteveG4]

Castrol Edge 0W-40 A3/B4

 

[OVERKILL]

You’re correct. Slight dilution, but nothing scary. Redline I would need to order, and prefer something I can just find at a local store.

The people I race with, have recommend diesel oils. Not sure I feel comfortable with that.

What lab did you use? Just asking because if it was Blackstone, it's probably way off.

Those people are making a pretty safe recommendation, HDEO's are quite popular in high performance applications and have proven to perform quite well.

 

[wpod]

Mobil 1 High mileage oil.

 

[LeoStrop]

Rotella T4 10w30 VOA

 

[madeej11]

What about Belgian Castrol 0w30, doesn't it have basically the same specs as the older German Castrol? Pretty thick for a 30 grade.

 

[mightymousetech]

I don’t know why you want to stick with a 10/30, just go to one of the Euro A3/B4 oils in a 0/40 or 5w40 and be done with it. I used Castrol 0W40 in my track Civic Si that called for 5W30 and it loved it.

 

[mahanddeem]

0w40 in winter or 5w40 euro in hot climates.