The first thing I did when I got my 2018 was dump the 0w20 and put in 5w30. Noticably quieter and smoother.
Used 5w-30 for the first time…
2016 5.7 w80k miles, owned since new. Always used M1 0w-20. Due for an oil change, drained it, realized I only had M1 5w-30 at the house. New Toyota filter, and in went 8.5qts of M1 5w-30 since I had to get on the road.
I’ve taken this same 340 mile trip many, many times over the years and always average around 15.5mpg, never been above 16.0mpg. Today, I averaged 17.3mpg. Same trip, same speeds, weather and winds were average as usual.
Im at a loss for this mpg increase but I’ll take it. I’ll keep running the 5w-30 if this keeps up.
I’ve taken this same 340 mile trip many, many times over the years and always average around 15.5mpg, never been above 16.0mpg. Today, I averaged 17.3mpg. Same trip, same speeds, weather and winds were average as usual.
Im at a loss for this mpg increase but I’ll take it. I’ll keep running the 5w-30 if this keeps up.
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Since that oil would be more viscous, I can’t imagine why it’d help mileage. The engine would be working a little harder to push that slightly thicker oil around. Maybe.
I’m just amazed that they use 0w20 in these things. Talk about precision machining! Back in the 70’s I used to run 20w50 in all my 100K plus vehicles because by then they were barely holding together.
I’m just amazed that they use 0w20 in these things. Talk about precision machining! Back in the 70’s I used to run 20w50 in all my 100K plus vehicles because by then they were barely holding together.
Is it possible that the thicker oil increased compression a little? I run Mobil 1 5W-30 in all my vehicles and have never had a problem. My wife’s 2012 Sienna has over 300K on the clock and still runs like newSince that oil would be more viscous, I can’t imagine why it’d help mileage. The engine would be working a little harder to push that slightly thicker oil around. Maybe.
I’m just amazed that they use 0w20 in these things. Talk about precision machining! Back in the 70’s I used to run 20w50 in all my 100K plus vehicles because by then they were barely holding together.
Hmm. I suppose but only if you were losing compression past the rings. The oil keeps it lubricated but I thought the rings were the secret to good compression. Maybe there’s enough inherent loss past them to make a difference. I dunno. We need an automotive engineer to chime in. I’m just a rock head (geologist).Is it possible that the thicker oil increased compression a little? I run Mobil 1 5W-30 in all my vehicles and have never had a problem. My wife’s 2012 Sienna has over 300K on the clock and still runs like new
I experienced the same MPG on the return trip. I am also under the same impression as some of you that have posted about the engine doing more work with the thicker oil, thus less mpg. So far, that has not been the case. My engine burns no oil, as in an unnoticeable negligible amount since I’ve owned it, since it was brand new.
For the next few weeks it will be all in town driving so I will post how it goes. Temps will be in the mid 80’s.
I can’t say the engine idles any quieter than it did when it was using 0w-20, but I can say without a doubt that the valve train noise is gone when the RPMs get above 3k rpms.
For the next few weeks it will be all in town driving so I will post how it goes. Temps will be in the mid 80’s.
I can’t say the engine idles any quieter than it did when it was using 0w-20, but I can say without a doubt that the valve train noise is gone when the RPMs get above 3k rpms.
Been using 5-30 for 70k . No issues , no real differences.
When the oil is fresh and new. You will get better mpg. Did you measure new 5w-30 vs. new 0w-20?
My 5.7 4wd RW DC has the TRD Supercharger. I had been running M1 0W-30 consistently. I haven't taken any long drives recently, but when i do I can get 17mpg generally. I just switched to Mobil 5000 10w-30, which is now a synthetic blend, and will be changing oil and filter at 5K miles. It is a 2011 with 73K miles.
That and a can of STP!Since that oil would be more viscous, I can’t imagine why it’d help mileage. The engine would be working a little harder to push that slightly thicker oil around. Maybe.
I’m just amazed that they use 0w20 in these things. Talk about precision machining! Back in the 70’s I used to run 20w50 in all my 100K plus vehicles because by then they were barely holding together.
That’s great! The big difference is the 0/20 gets to the cams and timing chains faster when it colder. One question, is there a difference in oil pressure on the highways and at idle?
Years ago I had a lengthy conversation with a lubrication engineer from EXXON/MOBIL. His high point statement was oil flowing through the filters, he added that even at operating oil temperatures. Depending on what grade oil used. That the oil filter bypass still opens because not all the oil is being filtered. That’s why it’s very important not to just get up and go with a cold engine! Because the oil bypass is just about wide open with cold oil. It’s like pouring cold oil and hot oil through a cotton “T” shirt. Think how long it would take? That’s why the bypass opens in a filter. The biggest thing is how a cold engine is driven. One last statement from the engineer, the shear point of the 0/20 is better than 10/30. You can go many more miles on an oil change with the 0/20 before it breaks down. Try to take it easy when the oil is cold, and.
“TAKE IT EASY WHILE YOU’RE GOING FAST”
Happy Memorial Day
Years ago I had a lengthy conversation with a lubrication engineer from EXXON/MOBIL. His high point statement was oil flowing through the filters, he added that even at operating oil temperatures. Depending on what grade oil used. That the oil filter bypass still opens because not all the oil is being filtered. That’s why it’s very important not to just get up and go with a cold engine! Because the oil bypass is just about wide open with cold oil. It’s like pouring cold oil and hot oil through a cotton “T” shirt. Think how long it would take? That’s why the bypass opens in a filter. The biggest thing is how a cold engine is driven. One last statement from the engineer, the shear point of the 0/20 is better than 10/30. You can go many more miles on an oil change with the 0/20 before it breaks down. Try to take it easy when the oil is cold, and.
“TAKE IT EASY WHILE YOU’RE GOING FAST”
Happy Memorial Day
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