300K and getting ready to take a trip what would you guys look at or replace
10-14-2010, 09:31 AM
#22
Registered User
Thread Starter
Nope this is the one I use http://www.mobiloil.com/USA-English/...uck_5W-40.aspx
Don't let the name fool you its a very good oil high in ZDDP and fully approved for gasoline engines.
FOG
Don't let the name fool you its a very good oil high in ZDDP and fully approved for gasoline engines.
FOG
10-14-2010, 07:08 PM
#24
Registered User
Thread Starter
The issue of oil weights provokes ALLOT of opinions and sometimes even arguments.
Engines used to run thicker oil but car companies that sell vehicles in the USA had to deal with CAFE. Cafe is where they take the average fuel economy off a companies vehicles and averages them. If the average is too low they get in trouble.
So a while back some bean counters realizing they could in a lab environment run a engine with the thin oils like we see today (0W-20,0W-30) and gain 1-2mpg. So if you get add 1-2mpg to every vehicle in your fleet you bring up your average.
Allot of people will argue the point saying its because engines have gotten tighter better construction and need thinner oils. The problem with this argument is that the major car makers like Ford,GM, and yes Toyota are selling vehicles with the same engines in them in other countries but specing 10W-30 or 5W-40 oil for their engines.
The 3.4 engine in our 4runners and tacos are a perfect example. Toyota here says 5 or 10W-30 but if you look in the owners manual for a land cruiser prado with the same 3.4 engine they say oil as heavy as 15W-40 can be used in warm climates.
The car makers here are sacrificing engine life for politics (the CAFE standard).
For the first 150K miles I ran 10W-30 all seasons. After I hit 150K and did allot of reading on oil and found out Toyota's outside of USA oil specs for the 3.4 engine I switched to 15W-40 in the summer and 5W-40 in the winter.
One thing to also keep in mind when selecting a oil for your 4runner or taco is that the engine does have a oil to engine coolant heat exchanger.
What this means aside from it keeping your oil from getting over 210-220F it also helps warm up the oil allot quicker.
And now its time for me to knock me out of my flu misery with my favorite drug NyQuil. You know its good stuff when it comes with its own shotglass.
FOG
Engines used to run thicker oil but car companies that sell vehicles in the USA had to deal with CAFE. Cafe is where they take the average fuel economy off a companies vehicles and averages them. If the average is too low they get in trouble.
So a while back some bean counters realizing they could in a lab environment run a engine with the thin oils like we see today (0W-20,0W-30) and gain 1-2mpg. So if you get add 1-2mpg to every vehicle in your fleet you bring up your average.
Allot of people will argue the point saying its because engines have gotten tighter better construction and need thinner oils. The problem with this argument is that the major car makers like Ford,GM, and yes Toyota are selling vehicles with the same engines in them in other countries but specing 10W-30 or 5W-40 oil for their engines.
The 3.4 engine in our 4runners and tacos are a perfect example. Toyota here says 5 or 10W-30 but if you look in the owners manual for a land cruiser prado with the same 3.4 engine they say oil as heavy as 15W-40 can be used in warm climates.
The car makers here are sacrificing engine life for politics (the CAFE standard).
For the first 150K miles I ran 10W-30 all seasons. After I hit 150K and did allot of reading on oil and found out Toyota's outside of USA oil specs for the 3.4 engine I switched to 15W-40 in the summer and 5W-40 in the winter.
One thing to also keep in mind when selecting a oil for your 4runner or taco is that the engine does have a oil to engine coolant heat exchanger.
What this means aside from it keeping your oil from getting over 210-220F it also helps warm up the oil allot quicker.
And now its time for me to knock me out of my flu misery with my favorite drug NyQuil. You know its good stuff when it comes with its own shotglass.
FOG
10-15-2010, 08:40 PM
#27
Registered User
Thread Starter
The reason for this is the higher the split like 0W-40 vs 15W-40 the higher the viscosity index (more additives) and the more likely the oil is to suffer shearing and break down under hash conditions.
FOG
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