Just out of curiosity, why would you use a weight of oil other than what the manufacturer specifies (i.e., the 5w20)?
Your friend is a dumbass...you not going to hurt anything with 5W30 but maybe gas milage...next time run 5W20 or 0W20 either way both oils are the same when it up to opperating temps. The 0W20 just flows alittle qwicker.So 1000 miles ago I changed my oil to Mobil 1 5w20/ Wix Filter. A friend of mine started telling me that I'm going to put a bunch of wear on the motor running 5w20. I read a few posts and ended up changing out the oil and filter. I was probably suckered but I ended up using Royal Purple 5w30 and a Purolator Pure One oversized filter. I can't tell the difference but I'm not as paranoid about running that light of an oil in the truck anymore. Those Purolator filters look pretty well built. Oh well, live and learn.
That is interesting info, Marc. I like the fuel efficiency part. What is the source for it?ILSAC GF–4 SAE 5W–20
This oil has been set as the Toyota genuine engine oil, starting in February 2006 forInformation
the U.S. This oil is superior in terms of fuel economy, engine protection, and cold
ILSAC GF–4 SAE 0W–20
This oil has even better fuel efficiency and cold starting performance than 5W–20. Initial
application for 0W–20 is in the 2006 model year 2AZ–FE engine and will be used in new
engines to be developed.
u are running way thicker oil then recomended5-30 this is not the old days were thicker was thought to be better. the new engines have way tighter tolerances and need thinner oil. do what u want but if your motor blows up and toyota tests the oil u have in it. they are going to laugh and u and u will be buying a new engine.I use 10w-40 in the winter and 20w-50 in the summer...