BETTER THAN YOU

iTrader: (7)

10w40

DREAMZ28

iTrader: (1)

Is there a diffeence between german Castrol and regular?

SparkyJJO

iTrader: (11)

Old thread is old.

The people saying 5W-30 in the summer is bad because it is hotter, 10W-30 is better crack me up. You do realize that both are multiweight oils, and when both are at operating temp, they both act as a 30 weight oil, right?

Fbodyjunkie06

iTrader: (10)

Well I used to use RP, never had a bad experience with it, just decided to try something new so I switched to Mobil 1 European Formula 0w-40 in my truck. I used 4 quarts of the 0w-40 and one quart of their Diesel 5w-40 since it has a lot more anti shear additives than gasoline oil. My truck has higher oil pressure at all times especially when fully hot and under load on the freeway I get 55-60 psi all day and 35-40 at idle whereas I was at 50 psi under load and around 25-30 psi at idle. It seems to like it as the motor runs quieter and smoother it seems. I think I'll try mixing 3 quarts of 0W-40 and 2 quarts of 5W-40 this time and see what it does just for ***** and giggles.

Mr Incredible

It doesn't matter, really, in the end. Either will work about the same as the other. The difference isn't worth arguing about. RP is simply more expensive.

nitrous-owen

iTrader: (2)

10w 30 is what the factory recommends

chadaclysm

10w30 here but I daily drive my car and have 96,000 miles.

Fbodyjunkie06

iTrader: (10)

Well I should add its at 74k now.

baalic

iTrader: (8)

Well.....this is like comparing apples to oranges here...

But as I said completed my tuneup...replaced with royal purple 10-30 and put the NGK-TR55 on it.....

It had conventional oil cheap fram filter, factory plugs and wires...all replaced...


Just so far I'm noticing an extreme difference in gas mileage, and the exhaust doesn't pop anymore like it would when revved up in park....

Soo...for me again.....Royal Purple as this is the second car I've put it in with the same results.....RP and M1 both good I still prefer RP....Although I never tried the GC or Amsoil

pheer

iTrader: (3)

well, ill be different..... i used AMSoil in my last vehicle, switched from mobile1 full synthetic... everything felt smoother.... my 2cents to this pointless thread...