I'd rather it be lower than not to help reduce intake valve deposits from oil vapors through the PCV system. I run PCV catch-cans on my truck and car to help reduce intake valve deposits and they do catch a decent amount of condensed oil vapor.
Valvoline Restore and Protect HTHS
- Thread starter Hubes
- Start date
Perhaps. But have you seen an oil with a low Noack that was of poor quality? It just seems to be a proxy, perhaps not a perfect one, of base oil quality. If I could choose, I’d pick an oil with a lower one every time.
I guess I am just more concerned with deposits than volatility.
Patman
Staff member
Redline 5w-20 has an HTHS of 3.1
It's also has a KV100 of 9.0 cSt which is almost into a 30 grade per J300.
Doubt you will get many or any deposits with an oil with low Noack.
Yes, lower Noack (less volatility with temperature) oil can lower the amount of vapors and deposits. I'd bet that higher Noack oils result in more piston ring pack deposits because that area runs pretty hot.
Mobil 1 ESP 0w30 is $27 per jug while Valvoline Restore and Protect 5W30 is $29 per jug (Walmart prices). So a $2.00 adder for using a oil that cleans hard carbon deposits off of pistons and oil ring packs .
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