z28convert

iTrader: (1)

i haved used 10-30 mobil one synthetic for over a year and since i have had my cam, about 1 month, the oil gets really thin after about 2-3 weeks. should i use a heavier weight oil?

Zymosis

iTrader: (7)

I run the German Castrol 0w30 (which has a similar weight to what you are running), and it does thinnen up a little, but oil pressure stays at about 40psi idle.

jmm98LS1

iTrader: (28)

I run that oil in both my ls1's and my gen I sbc. I've never noticed it get thin though.

jimbo98z

iTrader: (3)

Whe you say German Castrol, is that different than regular Castrol, or do you just mean Syntec?

shocker45

i live in a little colder area. winnipeg manitoba canada. at night it gets down to like 5 degrees some nights until june. is that 0-30 still okay, or should i go with a 5-40?

Dom

iTrader: (2)

Same exact bottle, but here in America laws don't apply to large coorporations so they put regular dyno oil in the syntec bottle. In germany they put real synthetic oil. So don't bother if it says Made in USA on the back.

I run 5w40 Mobil 1 synthetic, because the 5W30 Mobil 1 is almost a w20 and it thins out with usage. I woud use the eurpoean Castrol, but none is around me.

H8 LUZN

how can you tell its getting thin??? Im willing to bet your oil isnt changing unless your getting coolant in it. Are you basing this off of oil pressure readings??

If your car doesnt work with mobile one synthetic 10w-30 then there is somthing wrong with your car.. not the oil. (not trying to come off rude.. just tryin to help)

Zymosis

iTrader: (7)

Comes in a Castrol Syntec container. The newer bottles say European formula on the bottle in yellow. The back will said made in Germance. The bottom will have M04 or M05 serial number. It is green in color, and has shown some of the best oil analysis tests to date.

jimbo98z

iTrader: (3)

So basically, I've been getting hosed on Castrol Syntec and it's not really the fake stuff, it's liquid dinosaur? That's kind stupid. But Mobil 1 is actually a real synthetic?

REDWS6ROCKET

iTrader: (4)

mobil 1 0w-40 here and mobil 1 filter

Joker

Kendall GT full synthetic 5w30. Very happy with it.

Zymosis

iTrader: (7)

You haven't been getting hosed. The German Castrol is fully synthetic from my understanding. I'm sure patman will come in here and clean up the confusion any minute

Dom

iTrader: (2)

I just switched to 5W40 Mobil 1 as there is no european Castrol here.

z28convert

iTrader: (1)

I see how the oil looks when i put it in the car and when I drain it it just seems like the oil has been broken down more than i usually seen between changes. i know what your saying about something being wrong with the car and not the oil. thanks for the info.

Patman

Yes, the German Syntec is not only fully synthetic, but uses a very exotic base oil which requires no viscosity index improvers, which means this oil maintains it's viscosity extremely well.

Zymosis

iTrader: (7)

Thank you sir.

yak

iTrader: (15)

10 w 40 bitchs but I beat the **** out of my car.

coolformula

iTrader: (21)

I got a cammed car is the 0-30W GC good for that application? Just got the car and it has had 10-40w mobile 1