Should I switch to a thicker oil with high milage

[vertc6]

I have an 07 Tundra 5.7 that I just turned 150k using M1 5W 20 the entire time. Now that the rod and main bearings are sure to have some wear and the tolerances are not as tight should I switch to 5W 30? I know the 5W 30 has a little better wear protection than the 20 weight but you get better MPG with 20.

I am assuming it wouldn't hurt either way?

 

[SatinSilver]

How often is the oil changed buddy?

 

[lexus114]

Try it, see how it runs on it. Doubt your millage will suffer much if any.

 

[Donald]

Pull some of the bearing caps and use plastigauge to measure the clearance.

 

[bigt61]

Originally Posted By: Donald
Pull some of the bearing caps and use plastigauge to measure the clearance.


Yeah, that shouldn't take more than 10 minutes with a screwdriver. While you're in there, drop the crank and slide a few pistons out, check the skirts for wear and make sure no rings are stuck. Just a few more minutes and it makes an interesting side project while you're watching the news.

 

[PandaBear]

If you are not burning oil, just use what you've been using.

 

[vertc6]

Originally Posted By: bigt61
Originally Posted By: Donald
Pull some of the bearing caps and use plastigauge to measure the clearance.


Yeah, that shouldn't take more than 10 minutes with a screwdriver. While you're in there, drop the crank and slide a few pistons out, check the skirts for wear and make sure no rings are stuck. Just a few more minutes and it makes an interesting side project while you're watching the news.


LOL, now that's funny I don't care who you are!

I change it every 7500-8000.

 

[InhalingBullets]

I too have an '07 Tundra 5.7, but I have 160+. A few months ago tried out the (German) Castrol 0w30 and it did quieten down the engine some. I saw very little if any change in the fuel economy and it still ran like a scalded dog.
Most recently I put in the PP 5w30 and got the same results. I have been able to get the Castrol on sale at Autozone about every three months, I can get the PP at Wally world anytime which influenced my decision somewhat.

 

[vertc6]

That is good to know I think I will try 5w 30 now that we are coming into the summer months.

Thanks!

 

[lubedude13]

I'd run mobil 0w30

 

[Merkava_4]

I'd be running 10w30 in it. That's the oil recommended for the 2000 Tundra.

 

[Zaedock]

Originally Posted By: Merkava_4
I'd be running 10w30 in it. That's the oil recommended for the 2000 Tundra.


Totally different truck. I would stay with the 5W20 unless there was a consumption issue.