Current best oil for vq35de?

Pennzoil motor oil
I might do that. I am trying to be cost-conscious, and since I have quite the stash of other oils right now I need to see how I do that.

Thank you all for the input!
 
djipka said:
Hi folks,

It's been a moment since I last started a thread.
I still have my trusty 03 Maxima with the vq35de engine. Car runs great at over 238k miles. As usual it does consume quite a bit when driven hard, which for me is basically daily. Current consumption is over 1QT per 1000 miles. I'm currently using Quaker State Euro 5w40 as I got a stash of it in the last couple of years. OCI are around 5k mostly due to filter. Car is mechanically sound with maintenance up to date.
My question is with all the changes and advancements in chemistries and technology what would be the best oil for the older and higher mileage Vq35? Back in the day the best oils were GC 0w30 and Mobil 1 0w40. The GC is really not available anymore (similar oil available at O'Reilly but cost is high) and Mobil 1 has changed like 3 times since I used it last.

Thank you for your input!
Click to expand...
What's the oil change history on it prior to the Quaker State Euro? (Edit: I see now you supplied that info later on.)

Agree with others. No brainer to run Valvoline Restore and Protect 5W-30.
 
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The first place I would start is CRC intake valve cleaner, follow the instructions, clean or replace the pcv valve, clean the MAF with the proper cleaner, change the oil. Run it a 1k miles. Get another can of CRC valve and intake cleaner. Change the oil again. Run another 1k miles. Repeat it. Do this 3 times, run Redline fuel system cleaner, 3 times. Use shell premium fuel , that should really get those intake valves clean, also get the top of the pistons cleaned up. That’s what I’m doing in my subie and it’s really helping. Mpg has really come up a lot. From 25-34mpg. Granted it’s a 2.5L manual and driving the speed limits on cruise control
 
Bullwinkle007 said:
The first place I would start is CRC intake valve cleaner, follow the instructions, clean or replace the pcv valve, clean the MAF with the proper cleaner, change the oil. Run it a 1k miles. Get another can of CRC valve and intake cleaner. Change the oil again. Run another 1k miles. Repeat it. Do this 3 times, run Redline fuel system cleaner, 3 times. Use shell premium fuel , that should really get those intake valves clean, also get the top of the pistons cleaned up. That’s what I’m doing in my subie and it’s really helping. Mpg has really come up a lot. From 25-34mpg. Granted it’s a 2.5L manual and driving the speed limits on cruise control
Click to expand...
Could you elaborate why you think I need to do something with the intake valves? MAF has been cleaned on a regular cadence with the CRC MAF spray.
Did you read my post and subsequent comments? This car is not direct injected, intake is clean, I have an oil catch can...
 
djipka said:
Folks, one thought keeps bugging me.
With my spirited driving (aka Italian tune-up), I can't figure out how the rings would be clogged/stuck?
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It burned oil when you got it? I don't think Italian tune up can fix stuck rings. Maybe I am wrong?

Possibly yours has a minor issue from day 1 that cannot be fixed - like not quite correctly machined valve guides. If everything works and doesn't plug the cats I would not sweat it. However given all the success around here with Valvoline Restore and Protect - you might want to read those threads and decide if you want to give it a try.
 
Compression rings are pressed into the side of the cylinder walls from combustion pressure. As the engine rpm increases, with high throttle usage, the combustion pressure maxes out, and your rings get a real work out. The oil control rings don't function in the same way. They don't employ combustion pressure for a seal, in fact, they shouldn't be seeing much of any combustion pressure, thus, a high rpm "Italian tune up" won't do much for clogged oil control rings.
 
SC Maintenance said:
It burned oil when you got it? I don't think Italian tune up can fix stuck rings. Maybe I am wrong?

Possibly yours has a minor issue from day 1 that cannot be fixed - like not quite correctly machined valve guides. If everything works and doesn't plug the cats I would not sweat it. However given all the success around here with Valvoline Restore and Protect - you might want to read those threads and decide if you want to give it a try.
Click to expand...
Valvoline Restore and Protect is definitely something I have not discounted yet. I am just trying to avoid the cost of new oil since I have a stash already and $$$ is tight right now.
 
Nessism1 said:
Compression rings are pressed into the side of the cylinder walls from combustion pressure. As the engine rpm increases, with high throttle usage, the combustion pressure maxes out, and your rings get a real work out. The oil control rings don't function in the same way. They don't employ combustion pressure for a seal, in fact, they shouldn't be seeing much of any combustion pressure, thus, a high rpm "Italian tune up" won't do much for clogged oil control rings.
Click to expand...
Thank you for the details! It does make sense.
 
djipka said:
Thank you for the details! It does make sense.
Click to expand...
Look Valvoline Restore and Protect is the Goldie locks oil on this forum and can do no wrong at the moment please give it a Shot and share the results. If the results are not positive I wanna be here for the excuses and justification of what happened. 😀😀😀
 
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