Originally Posted by Gokhan
Originally Posted by nicholas
Car in question - 2010 Santa Fe 3.5.
It had 5w-20 for 142,000kms - - at 142,500 the exhaust CVVT actuator seals went - requiring a total exhaust sidereplacement.
Oil was changed every 6 months regardless of kms - - -usually changed between 3-5000 kms - with syn 5w-20 or 0w-20 in the winter.
My commute is a 1.5 to 2 min suburban drive to work very little highway driving. In winter it can get -30 celsius for weeks.....
Most likely a high fuel concentration - - - - The tech seemed to think that the oil had thinned down and could not protect the seal anymore, over a number of years.
I just switched to a 5w-30 - - engine is much quieter and feel smoother - - - -
I think in certain driving situations 5w-20 does not work for all engines. Like my very short tripping.
My 2c
Everytime you change the oil, the engine is going to run quieter and smoother because new oil has significantly less friction than used oil.
In addition, I don't know if you're using a different brand and making an apples vs. oranges comparison.
Seal life has nothing to do with the oil viscosity but only the seal compatibility of the base oil and additives.
Most 5W-20 oils have substantially thicker base oils than 5W-30 oils and they protect the valvetrain, timing chain, piston rings, and cylinder liners better than 5W-30 oils do. That's because 5W-30 uses more VII and they need to use a thinner base oil to be able to still meet the cold-cranking spec. 5W-30 will protect the bearings better because of the higher HTHS viscosity but most people don't run into problems in that area to begin with.
So are you suggesting the 5w20 is better for short trips? This is the first claim I've seen on here that 20 weights protect certain areas better than 30 weights and vice versa.
Not challenging...just trying to learn.
Is there there any proof to this?
Originally Posted by nicholas
Car in question - 2010 Santa Fe 3.5.
It had 5w-20 for 142,000kms - - at 142,500 the exhaust CVVT actuator seals went - requiring a total exhaust sidereplacement.
Oil was changed every 6 months regardless of kms - - -usually changed between 3-5000 kms - with syn 5w-20 or 0w-20 in the winter.
My commute is a 1.5 to 2 min suburban drive to work very little highway driving. In winter it can get -30 celsius for weeks.....
Most likely a high fuel concentration - - - - The tech seemed to think that the oil had thinned down and could not protect the seal anymore, over a number of years.
I just switched to a 5w-30 - - engine is much quieter and feel smoother - - - -
I think in certain driving situations 5w-20 does not work for all engines. Like my very short tripping.
My 2c
Everytime you change the oil, the engine is going to run quieter and smoother because new oil has significantly less friction than used oil.
In addition, I don't know if you're using a different brand and making an apples vs. oranges comparison.
Seal life has nothing to do with the oil viscosity but only the seal compatibility of the base oil and additives.
Most 5W-20 oils have substantially thicker base oils than 5W-30 oils and they protect the valvetrain, timing chain, piston rings, and cylinder liners better than 5W-30 oils do. That's because 5W-30 uses more VII and they need to use a thinner base oil to be able to still meet the cold-cranking spec. 5W-30 will protect the bearings better because of the higher HTHS viscosity but most people don't run into problems in that area to begin with.
So are you suggesting the 5w20 is better for short trips? This is the first claim I've seen on here that 20 weights protect certain areas better than 30 weights and vice versa.
Not challenging...just trying to learn.
Is there there any proof to this?
