Issues with going 10 higher on the summer weight?

[lomez]

Dumb question I know, and I have my own opinion on this, but.....
My 4Runner is nearly due for an engine oil swap. It calls for 5W30 for all climates. Today, I noticed that in my garage I have a 5 liter jug of Synthetic Rotella; BUT, it's a 5W40. Thoughts on using a 40 and saving a few bucks....or no, and stick with 30?

 

[HTSS_TR]

Unless you're in desert summer in coastal area are very mild, 5W40 is too thick for your 4Runner. I would buy a jug PP 5W20 and mix 50-50 with Rotella 5W40.

 

[RiceCake]

Should be able to run it without issue, but expect loss in mileage. There's no other effects (or benefits).

 

[Brons2]

If you live in Barstow - do it
If you live in Eureka - go with HTSS_TR's advice.

 

[Clevy]

It won't do any harm and if the loss of engine responsiveness is too much for you you can always drain out a few quarts and put in a 20 grade.
Or follow the suggestion above and just mix the 20 and 40 grades together right off the bat.
How many quarts does the sump hold. If more than 5 grab the extra quarts needed in a 20 grade flavour. AFE 0w-20 or tgmo 0w-20 should thin it nicely and would boost the viscosity index a bit.

 

[skyship]

If the car is under warranty don't use it, otherwise it will be a good oil for one run in summer. I've never heard of a problem going one grade higher than a current US spec and neither have Blackstones according to one article on their web site.

 

[expat]

Years ago I used to use 20w-50 year round in a Toyota PU
That truck lasted 500k, while I had it!

It won't do any harm.

 

[KD0AXS]

Not going to hurt anything at all, but that's a great oil for use in lawn mowers and other outdoor power equipment so that's where I'd use it if possible.

 

[david_ES2]

Id run it, see if it does any miracle cleaning!

 

[aquariuscsm]

Won`t hurt a thing. Here`s an old UOA of a guy running 15W50 in a Toyota. Not sure if there`s any similarities with yours though engine-wise:

https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=249928&page=1

 

[jorton]

Running it will be an experiment. You may notice changes in drivability like odd shifting if the vehicle is an auto trans, or it could feel like the brakes are on during acceleration.

If you don't like it you'll have dump it early, and that is a waste.

 

[TFB1]

Unless you're anal about everything in life(welcome to BITOG), you won't be able to tell the difference and then it would be imagined...

 

[dave1251]

I would use it in the summer months it is not likely ideal but there is nothing wrong in using it.

 

[JavierG]

Originally Posted By: lomez
Dumb question I know, and I have my own opinion on this, but.....
My 4Runner is nearly due for an engine oil swap. It calls for 5W30 for all climates. Today, I noticed that in my garage I have a 5 liter jug of Synthetic Rotella; BUT, it's a 5W40. Thoughts on using a 40 and saving a few bucks....or no, and stick with 30?

I didn't know T6 came in 5 liter jugs. All I've ever found are the 1 gallon jugs.

Where in Cali do you live. In my neck of the woods it would be no problem as we routinely see 100+ degree days in the summer.

 

[HerrStig]

I run T6 in Toyota products all year round.

 

[A_Harman]

It's a 5w40. You can run it year-round with no problem.
If you notice any difference in fuel mileage, I'd be impressed at how accurately you can measure it.

 

[Shannow]

Originally Posted By: jorton
Running it will be an experiment. You may notice changes in drivability like odd shifting if the vehicle is an auto trans, or it could feel like the brakes are on during acceleration.


Nothing like a good laugh on a Sunday morning.

 

[jorton]

It was not funny for me when I experimented with 10w30 in my 05 Ford Focus. I drained it early because the car shifted oddly and it felt like the brakes were on when accelerating.

 

[TFB1]

Originally Posted By: jorton
It was not funny for me when I experimented with 10w30 in my 05 Ford Focus. I drained it early because the car shifted oddly and it felt like the brakes were on when accelerating.


What'd ya have to do to get it to shift correctly??? Motor oil surely didn't have anything to do with fixing that... I suppose in low HP vehicles a thicker oil may make them sluggish when cold, only drive RWD V8s so I dunno...

 

[jorton]

All I did was drain Valvoline 10w30 and refill with Quaker State 5w-20, and change P1 filter with a new Motorcraft. The car feels fast again.