Originally Posted by Spike555

Nope, waste of money in my opinion.
Unless you are driving all expressway and going 10,000 miles between oil changes and its a Civic your wasting your money.
I have spent hours reading every part of this web site and with personal experience I will not use full syn motor oil.
http://www.carbibles.com/engineoil_bible.html

Oil additives are a waste as well as high mileage engine oils.
High mileage oils are good if you have a leak but no need to use them unless you have a leak.

I like the extra hot protection a 15w- oil gives.
If you read through the site he explains how they get the numbers for motor oil.
A 5w-30 is a "5" weight oil that protects the same as a "30" weight oil.
A 0w-40 is a "5" weight oil that has special stuff in it to make it flow better at cold and protects like a "40" weight oil.
a 15w-40 is a "15" weight oil but protects like a "40" weight.
But now here is the kicker, when oil starts to break down it looses its viscosity, so a "5" weight oil when new may become a "2" weight after a few thousand miles.
Heat breaks down oil, the additives burn off and the viscosity breaks down and sludge forms.
During the summer when internal engine temps can get extremely high, like when off roading, sitting in traffic with the a/c cranking on hi, towing a trailer that oil will break down quick.
Unless you are using a "true" full syn, like Amsoil or Royal Purple you are not getting any extra protection than you would get from a high quailty diesel oil.
Mobil 1, Castrol Syntec, Pennzoil Platinum, etc. are NOT true full syn oils.

If Shell Rotella is good enough for the $250,000 combine that the farmer depends on year in and year out its good enough for my Rover.

Originally Posted by instg8r

If I read correctly in that link you posted, it said to only use a diesel oil for cleaning purpoases and to only use them for 500 miles....


reading that article has only made me more confused.

Originally Posted by Spike555

But if you read the whole site he says different deeper in.
I have been using diesel oil for a long time in alot of different engines, including a 4cyl Camry that I had.

Diesel oil has alot of detergents in it because diesels are dirty.
You will have no ill effects from using a diesel oil in your car or truck.
It is just fine to use, trust me, I look trust worthy dont I? LOL