viscosity at 100cst =
synpower 5w30= 10.5
synpower 20w50= 19.5
that oil is almost twice as thick as what is recomended
synpower 5w30= 10.5
synpower 20w50= 19.5
that oil is almost twice as thick as what is recomended
Oil change mistake! Change or not?
- Thread starter Fbear
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If I made the same mistake I would leave it in just out of curiosity to see how the car would run, provided my engine would not have extra tapping or metal to metal noises at start up.
If the engine starts up normally and runs the same otherwise, then I would leave it in.
Oh... and tolerances have nothing to do with oil thickness.
If the engine starts up normally and runs the same otherwise, then I would leave it in.
Oh... and tolerances have nothing to do with oil thickness.
Originally Posted By: Zaedock
Well, now that it's been warm, I wouldn't worry about it.
+1
Well, now that it's been warm, I wouldn't worry about it.
+1
Originally Posted By: TallPaul
Biggest oil change mistake is changing oil way too soon.
Really how so?
Biggest oil change mistake is changing oil way too soon.
Really how so?
Originally Posted By: jstutz
Originally Posted By: ARCOgraphite
No problem. Tolerances are not a problem. Too thin is a problem. Hav him check his fuel mileage, I bet there is little or no change. Higher viscosity oil can affect the leakdown rate of hydraulic lifters and VVT operation - but would just trade some low rpm torque with much increase high rpm torque.
Why would the 20w50 affect the leakdown of the lifters. It would leak down slower with the 20w50, which is a good thing right?
Some engines use fast leakdown rate lifters, which provides a cheap way to get variable lift and duration valve action. IIRC the OHV chevy 2.2 and older V8 and V6 with roller follower employ this. Dont think the Toyota would though.
Originally Posted By: ARCOgraphite
No problem. Tolerances are not a problem. Too thin is a problem. Hav him check his fuel mileage, I bet there is little or no change. Higher viscosity oil can affect the leakdown rate of hydraulic lifters and VVT operation - but would just trade some low rpm torque with much increase high rpm torque.
Why would the 20w50 affect the leakdown of the lifters. It would leak down slower with the 20w50, which is a good thing right?
Some engines use fast leakdown rate lifters, which provides a cheap way to get variable lift and duration valve action. IIRC the OHV chevy 2.2 and older V8 and V6 with roller follower employ this. Dont think the Toyota would though.
Originally Posted By: Boss302fan
I agree. Pretty stupid and cheap to not drain the 50 weight oil and pour in the correct weight oil. It is a no brainer to change out the oil... Why take the chance on ruining your engine? Blowing out a gasket? Etc...
Blowing a gasket? He better never cold start the car then when the oil is >> 1000cSt. THIN oil in hot weather and high load is the unsafe operation, not a little thicker. IYAM, Pretty stupid to worry about running a 50w in warm climate.
I agree. Pretty stupid and cheap to not drain the 50 weight oil and pour in the correct weight oil. It is a no brainer to change out the oil... Why take the chance on ruining your engine? Blowing out a gasket? Etc...
Blowing a gasket? He better never cold start the car then when the oil is >> 1000cSt. THIN oil in hot weather and high load is the unsafe operation, not a little thicker. IYAM, Pretty stupid to worry about running a 50w in warm climate.
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I would leave it in there for the duration of the change.
Lots of people run that Lucas Oil Stabilizer and STP oil thickener in their oil. All that stuff does is turn a 30 weight into a 50 weight or thicker.
If this was a semi-synthetic or a synthetic 20w50 then that is even better as it will be thinner than a dino 20w50 at room temp.
Regardless I dont think you will have an issue.
But what you do have is an interesting experiment.
Lots of people run that Lucas Oil Stabilizer and STP oil thickener in their oil. All that stuff does is turn a 30 weight into a 50 weight or thicker.
If this was a semi-synthetic or a synthetic 20w50 then that is even better as it will be thinner than a dino 20w50 at room temp.
Regardless I dont think you will have an issue.
But what you do have is an interesting experiment.
Originally Posted By: zloveraz
Originally Posted By: TallPaul
Biggest oil change mistake is changing oil way too soon.
Really how so?
way too soon = waste. This is a limited resource.
Originally Posted By: TallPaul
Biggest oil change mistake is changing oil way too soon.
Really how so?
way too soon = waste. This is a limited resource.
I would drain it into a CLEAN container, and use it qt. by qt. as a top off oil. No waste...PERFECT SOLUTION!
I have some 5w30 RP I drained out after a week. Its still on my front porch in a 5qt jug after 2 years ...
Originally Posted By: ARCOgraphite
I have some 5w30 RP I drained out after a week. Its still on my front porch in a 5qt jug after 2 years ...
I have some 5w30 RP I drained out after a week. Its still on my front porch in a 5qt jug after 2 years ...
I'd leave it in, it won't hurt anything. If anything, you'll just get slightly less gas mileage. With the warmer weather coming up, you won't have any issues.
Originally Posted By: gfh77665
I would drain it into a CLEAN container, and use it qt. by qt. as a top off oil. No waste...PERFECT SOLUTION!
+1
Thats exactly what I would do since your in Massachusettes where it is overall cooler then most places...Since the temperatures right now are in the 40's and 50's that makes the most sense.
I would drain it into a CLEAN container, and use it qt. by qt. as a top off oil. No waste...PERFECT SOLUTION!
+1
Thats exactly what I would do since your in Massachusettes where it is overall cooler then most places...Since the temperatures right now are in the 40's and 50's that makes the most sense.
Leave it, he'll be fine. Someone else mentioned noises, that's the only time I'd change it out.
Originally Posted By: Boss302fan
I agree. Pretty stupid and cheap to not drain the 50 weight oil and pour in the correct weight oil. It is a no brainer to change out the oil... Why take the chance on ruining your engine? Blowing out a gasket? Etc...
All those poor Aussie's blowing out gaskets with 20W50 and 40W70 motor oil.
I agree. Pretty stupid and cheap to not drain the 50 weight oil and pour in the correct weight oil. It is a no brainer to change out the oil... Why take the chance on ruining your engine? Blowing out a gasket? Etc...
All those poor Aussie's blowing out gaskets with 20W50 and 40W70 motor oil.
Originally Posted By: ARCOgraphite
Originally Posted By: jstutz
Originally Posted By: ARCOgraphite
No problem. Tolerances are not a problem. Too thin is a problem. Hav him check his fuel mileage, I bet there is little or no change. Higher viscosity oil can affect the leakdown rate of hydraulic lifters and VVT operation - but would just trade some low rpm torque with much increase high rpm torque.
Why would the 20w50 affect the leakdown of the lifters. It would leak down slower with the 20w50, which is a good thing right?
Some engines use fast leakdown rate lifters, which provides a cheap way to get variable lift and duration valve action. IIRC the OHV chevy 2.2 and older V8 and V6 with roller follower employ this. Dont think the Toyota would though.
Doesn't the Toyota V6 employ a shim/bucket (DAMB) setup? My old 5VF-FE 3.4 did.
Originally Posted By: jstutz
Originally Posted By: ARCOgraphite
No problem. Tolerances are not a problem. Too thin is a problem. Hav him check his fuel mileage, I bet there is little or no change. Higher viscosity oil can affect the leakdown rate of hydraulic lifters and VVT operation - but would just trade some low rpm torque with much increase high rpm torque.
Why would the 20w50 affect the leakdown of the lifters. It would leak down slower with the 20w50, which is a good thing right?
Some engines use fast leakdown rate lifters, which provides a cheap way to get variable lift and duration valve action. IIRC the OHV chevy 2.2 and older V8 and V6 with roller follower employ this. Dont think the Toyota would though.
Doesn't the Toyota V6 employ a shim/bucket (DAMB) setup? My old 5VF-FE 3.4 did.
This idea of recommending one weight, and one weight only, of engine oil is strictly a rule of the EPA. The manufacturers have to recommend that weight oil that the manufacturer used to obtain their official mpg figures on the window sticker.
A look at an owner's manual from a vehicle I owned back in the 80's, a Pontiac Bonneville, show's recommendations for almost every weight of oil then manufactured, from straight 10 weight to 20W50, and everything in between. Temperature limitations applied. 20W50 was good from 20 degrees on up. 10W30 and 10W40 was good from 0 degrees on up. Straight 10 weight was good up to 60 degrees. Straight 30 weight was good above 40 degrees. The preferred viscosity was 10W30.
A look at an owner's manual from a vehicle I owned back in the 80's, a Pontiac Bonneville, show's recommendations for almost every weight of oil then manufactured, from straight 10 weight to 20W50, and everything in between. Temperature limitations applied. 20W50 was good from 20 degrees on up. 10W30 and 10W40 was good from 0 degrees on up. Straight 10 weight was good up to 60 degrees. Straight 30 weight was good above 40 degrees. The preferred viscosity was 10W30.
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