Thicker Oil For Oil Consumption
- Thread starter Charmet37
- Start date
Depends on the source of oil consumption. Sometimes it may make it worse.
The vehicle in question? How bad is the consumption? 100% positive it's burning and not leaking out?
The vehicle in question? How bad is the consumption? 100% positive it's burning and not leaking out?
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- Nov 9, 2020
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just curious if using thicker oil really works, No oil consumption issues yet.
It does, if source of consumption is wear. Sometimes may help seal up the valve guides temporarily. But with carboned up rings and ringlands - thicker oil may worsen that issue. Or at least that was the consensus a few years ago on some topics about 1ZZ and 2AZ Toyota engines.
Thicker can make a difference, but high mileage oils (MaxLife red bottle especially) have worked for me in the past.
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I’m good, No consumption…Just curious if thicker oil really work.
Jackson_Slugger
$50 Site Donor 2022
Most of the time probably yes, and the rule of thumb into the 90's was use thicker oil as a car aged. Better base oils and the advent of HM oils have made this less sage. But in some cases, often times in some Toyota 1.8Ls, it can make it worse due to clogging passages restricting flow.
But yeah there were a couple times I changed oil on a beater and found it burned so I put in STP or something like it to slow it down and went to heavier the next change.....
Yes, it often helps markedly. However, the change in viscosity generally must be significant. Going from a 0/5W-20 to a 5W-30 is not likely to make any real difference. Going to 10W-40 or 15W-50 will probably work. Prius owners move to 20W-50 and sometimes get another 100K miles.
It would have helped more if the thicker oil was used before consumption started to increase.
I haven't checked my own rolling oil consumption experiment (Project xB) in some time 
Under most conditions (Toyota pistons excluded) a thicker oil will burn less
How much less depends on how/where it's burning
Under most conditions (Toyota pistons excluded) a thicker oil will burn less
How much less depends on how/where it's burning
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Oil consumption from:
Bad oil rings or sticking ring - likely not
Worn valve guides - maybe
Leaky gaskets or seals - likely but still better off with a high mileage oil or different brand or even going back to a semi synthetic.
Different brands do different things to different engines. Its not a one size fits all answer.
Bad oil rings or sticking ring - likely not
Worn valve guides - maybe
Leaky gaskets or seals - likely but still better off with a high mileage oil or different brand or even going back to a semi synthetic.
Different brands do different things to different engines. Its not a one size fits all answer.
Jackson_Slugger
$50 Site Donor 2022
Or maybe buy better engines without manufacturer defects. And some of the least reliable engines are the ones that called for thicker oil to begin with, ask about my brother's early 2000's Porche he bought for a song...
Jackson_Slugger
$50 Site Donor 2022
lol What? leave the sediment in the bottom of the pan?
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