mjr46

hmmmm okay.....anyway I saw a episode where horsepower tv switched out rear, tranny and engine oil for all royal purple synthetics and picked up 8 rwhp on the dyno....but I'd more so attribute the gain to synthetic vs conventional not on RP as a product cause other synthetics can do the same

302army187

i dig castrol syntec!

the walmart by me must have messed up the price, becase a 5qt jug is only $19
(do the math, at $5.80 a qt, 5 qts is $29)

so i bought a few, and in about a mth ill put it in this car.

ive use it before in my old truck, and never gave me an issue, and for the price, for full sythetic oil.......... you cant beat it

stang8689

I like AMS, but I do get the $20 jug of castrol synthetic from Walmart sometimes, can't beat it

H0SS302

$7 5q jug of pensoil at advance auto...

bighungrymatt

+1 wal mart castrol synthetic $20, thats what I have been using

w8less

agreed i use castrol synthetic in all of my cars

cleanfitty

unfortunately castrol syntc isn't a "true" synthetic.

302army187

bold statement for no back up

TI302

where are you guys getting 5qt jugs? all the jugs here are 4 qaurts (1 gallon) so i always have to grab a jug and a single quart

cleanfitty

A true synthetic is exactly that, on oil that is created in a lab and have nothing to do with crude. (ie Mobil 1, Amsoil, Redline, Royal Purple) Almost all others that claim themselves a 100% synthetic are typically not that. Their base is started out with crude oil that refined very well, then they add some other stuff and call it synthetic. (like castrol, super tech, valvoline,)

There are 2 variations of Castrol Syntec that are a true synthetic, and those are usually made in Germany or Europe. (Look on the back of the bottle and see where it is made) These are usually not common weights though.

If the stuff is made in the USA then it isn't a true "synthetic"

Also because of the Mobil 1 had a lawsuit against Castrol becasue of what they claim, and it was ruled that Castrol can put anything they want on the labels.

Do some research next time you try to come up with a bold statement of your own...