Thickest oil for leaking EJ25

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Hello everyone. My subaru is leaking oil from the head gasket and is getting worse since I started useing Rotella T5. I used it because i thought it would be pretty thick thus slowing the leak. I noticed it leaked alot slower with Castrol High Mileage but i hate castrol products. Im thinking the T5s higher syn content is why its leaking more. Would a conventional High Mileage oil like Pennzoil be better? Im trying to slow the leak and not put more than the cars value into getting the leak fixed. Thanks in advance to all who answer.
 
An oil isn't going to fix a leaking HG.

You might try Maxlife, Defy, etc, but I don't expect any will help much. No reason not to stay with 5w30.
 
Subaru approves 10w-40 for your application in temps above -4°F -- use that little tidbit of info to select a good high mileage product.
 
Will 10w-40 hurt my gas mileage much? I love my scoobie because it gets awesome mpgs while goin anywhere anytime.
 
Pennzoil High Mileage in 10w40 might help. Gas mileage difference between that and Rotella would likely be too close to even measure.
 
You said Castrol High Mileage slowed down the leak BUT you hate Castrol products. Why may I ask do you hate them?
 
I THINK it slowed it because it is basically conventional. But i hate castrol becasue its made by BP. I hate BP because they still havent said sorry for the oil spill. In all honesty I just hate forest green.
 
And I owe thanks to whoever recommended Maxlife 10w-40 for my VQ. It loves the stuff. It barely consumes it or leaks it now.
 
Ok. I just hope i dont take a noticeable hit to my mpg. It seems to get close to 30 on the highway. Its impressive.
 
Slowing a leak with thicker oil is a effort in futility, once it's bad enough to drip only thing that may help is a High Mileage oil...
 
Originally Posted By: Volv04Life
Ok. I just hope i dont take a noticeable hit to my mpg. It seems to get close to 30 on the highway. Its impressive.


...and you have a leaking head gasket -- talk about misplaced priorities.
 
Originally Posted By: TFB1
Slowing a leak with thicker oil is a effort in futility, once it's bad enough to drip only thing that may help is a High Mileage oil...


I knowwwww. lol Im trying to see what the THICKEST HIGH MILEAGE oil is. Im thinking Pennzoil High Mileage since it has very little syn content. My subaru seems to start hemorrhaging when I use synthetic blend or synthetic.
 
Originally Posted By: Ramblejam
Originally Posted By: Volv04Life
Ok. I just hope i dont take a noticeable hit to my mpg. It seems to get close to 30 on the highway. Its impressive.


...and you have a leaking head gasket -- talk about misplaced priorities.



It only leaks oil. Atleast for now. No sign of mixing says the dealership mechanic.
smile.gif
 
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