Looking carefully at that Toyota TSB allowing 5W-20 is for 2006 model year and later only. Our Toyotas are 1999 and 2005. I'm not going to take a 200,000 mile 1999 Camry and experiment with 5W-20 to gain 1mpg, maybe.
My experience has been that valve guides generally wear out before rings anyway. We did have one case where rings were not sealing well on a motorcycle and thicker oil helped raise compression and power. Smoke was not an issue before or after. Consumption was difficult to measure because we change the oil every race weekend.
One of the additives in modern "Energy Conserving" oil is a friction modifier that helps the oil rings scrape oil away more easily, leading to slightly less hydrodynamic drag.
The last link (BITOG: Toyota TSB On Oil Use) I posted was just to show that 440Magnum's general experiences with thick vs thin oils, which happened to be in a Toyota TSB discussion. I think he just prefers to use the OEM-recommended (hot) viscosities rather than unnecessarily thick oils (TX Heat and Oil).
Well ever since i've had my Ex, i've used Mobil 1 5W-30... at 155k, burning about 1 qt every 5k, but with no leaks, i don't see any reason to change...
Well ever since i've had my Ex, i've used Mobil 1 5W-30... at 155k, burning about 1 qt every 5k, but with no leaks, i don't see any reason to change...
any thoughts?
I've run 5w20 exclusively in my Tritons and Vulcans and have had nothing but good UOAs, even at 12k miles on Pennzoil Platinum 5w20. I see no reason to change AND I see no reason not to change. I hope that helps .
Well ever since i've had my Ex, i've used Mobil 1 5W-30... at 155k, burning about 1 qt every 5k, but with no leaks, i don't see any reason to change...
any thoughts?
Stick with what your doing... My warrenty is expired I'm running 5w-30 now.(from 5w-20)
Did you ever decide on an oil? I'd say, if you feel the need to go 40 weight, go 5W-40, like Rotella-T Synthetic. Been great for me. Gives me the 40 weight that I want without the thicker viscosity at start up.
__________________ 1986 F-150 5.0 EFI XLT Lariat 4x4 NP435/NP208/9" 3.50
"Custom Exhaust" and leaf spring overloads
31x10.50 15" Nothing special, but it's a damn good truck.
I need some thoughts. I don't know much about oil. I use 10w30 weight. My motor has a lot of miles and I was thinking about moving up to a heavier weight oil. My motor doesn't leak or burn any oil between changes, but is this a good reason not to change oil weight?
Is 10w40 the next step up? If so, is it enough to matter?
I don't want to strain my oil pump or anything like that but I would like to help prolong my engine life if possible.
Any information is good information. I've asked about this before but never really came to any conclusions. I'm ready to change oil weight now though.
Thanks guys
Bill, your 300 I-6 was built to last and to challenge the test of time. Do nothing different from the what the owners manual recommends and you'll be good to go.
I'm sure that part of your concern is that you moved into a colder climate and your rig is getting a little long in the tooth. Worry not my friend, you have obviously been doing all the right things right.
Tim
__________________ SCPO United States Coast Guard Retired '04 Expedition XLT 4x2 '99 Taurus Wagon SE 24V '88 F-150 4x4 XLT Lariat 5.8L 5Spd
Rights of Passage: CPO Initiation, Submarine Qualified (SS), Golden Shellback, Blue Nose, Order of the Ditch
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