5W20 syn oil for vehicle with spec for 0W20?
Fido $0 3Gb LTE + overage plan until Feb 2019
May 26th, 2015 6:41 am
May 26th, 2015 7:10 am
May 26th, 2015 7:41 am
Any chance you could return the oil and swap it with 0 weight from the original supplier/vendor?
May 26th, 2015 9:20 am
May 26th, 2015 9:24 am
May 26th, 2015 9:52 am
May 26th, 2015 10:01 am
May 26th, 2015 10:03 am
I thought that playing around with viscosity is not recommended. Can you provide some more references to support your statement.macnut wrote: ↑May 26th, 2015 9:52 amThe reason Japanese automakers started using 0W20 oil was solely to achieve a 0.5% - 1.0% improvement in U.S. EPA fuel economy numbers.
And that improvement only applies for a cold start until the engine has warmed up.
So it's not that their engines were designed in the first place with tighter tolerances that they absolutely need such a thin oil.
I would think that using a 5W20 year-round will not cause you any issues. Any slight loss in fuel economy will be more than offset by the savings in the relative price of 5W20 vs. 0W20 oil.
May 26th, 2015 12:04 pm
May 26th, 2015 12:27 pm
http://www.bobistheoilguy.com/forums/ub ... ost2576182Asker123 wrote: ↑May 26th, 2015 10:03 amI thought that playing around with viscosity is not recommended. Can you provide some more references to support your statement.
I mean I can buy the idea that in summer 5w20 can replace 0w20 as the cars come to operating temperatures pretty quickly but in winters too ? Not sure...
May 26th, 2015 2:29 pm
May 26th, 2015 2:56 pm
May 26th, 2015 2:57 pm
May 26th, 2015 3:02 pm
I'm not a gasoline engine design engineer, but your essentially arguing that all of us should go with oils the manufacturer says we should not use. They may use tighter tolerances because they have speced thinner oil, how will the thicker oil affect that? We simply do not have enough technical information to second guess the manufacturer.macnut wrote: ↑May 26th, 2015 2:57 pmNo question that cold starts at any time of year are a main contributor to engine wear over time.
However, there are other things to consider regarding how well your engine oil is going to protect your engine in certain circumstances.
What happens when driving on the highway if your engine overheats a bit because the thermostat or water pump or something is on the fritz?
Which oil is going to provide better protection then? The 0W20? Or the 5W20? Or maybe that's when you would be better off with a 0W30?
The auto maker has to juggle their priorities in specifying an oil grade, but those priorities don't necessarily align with what a typical car owner is going to encounter in real life.
As the article I linked to earlier asks - does anyone have an explanation why Ford specified a thin oil for its engines in N. America but not for the very same engines in Europe?
That article may be a bit out of date now, but don't underestimate the role of CAFE and oil industry marketing in this debate.
May 26th, 2015 5:22 pm