mobil 1 with gold cap(super syn) = ~$27
mobil 1 with silver cap =$21

anyone know what is the difference between the 2?

 

$6

 

One is extended performance or whatever the hell it's called.

 

super syn says you can go 15k before oil changes,just read the containers

 

 

Even if the oil is good for 15,000 miles, I´m not so sure I´d leave the same oil filter on there that long, if it was my car. I feel more comfortable changing the filter every 2,500 miles. Or is this overkill?

 

yeah, gold cap is their new "extended performance" guarenteed oil. I use it just to be on the safe side even though I change oil reguarily.

 

Almost all synthetic oil is good for 15k miles or so, i change my filter every 5k miles and add oil a 1/2 quart or whatever to make it right.

The oil filter is the part that goes bad.

 

The extended performance is great for a non-turbo car, but turbo's do nasty things to oil, even synthetics.

The very small clearances and high heat and RPMs inside the turbocharger just tear the oil molecules apart (well the chains of molecules). Basically, that's why we change oil to begin with. Over time the long chain molecules of oil break down into much smaller ones, which are thinner and don't coat/protect the moving parts as much.

The turbo really speeds this breakdown process up due to the large shear stresses in the oil passeges there (mostly from the small clearances and high rpms).

Their super-syn might work well in turbo cars, but I would never go over 5k for a change, regardless of what the manuf. says. If Mitsubishi started validating Mobil's claims, then I might consider lengthening the interval with the new oil.

hope this helps,
a

 

I still use the regular (silver) mobil 1.

Is the other one is better? I dont know and it probably doesn't matter because I change the oil every 1500 miles in the first place.

 

every 1500? seems like overkill

 

how often do you run your car hard? on a regular basis or just every now and then? if it isnt to often there is no need to change your oil every 1500 miles

 

totally agree with chain scission/viscosity break down. Also there are combustion by products that linger in the oil.... change mine every 3K to 3.5K on my evo8. On this 9, i barely broke it in after 2 months, live 1 mile from work:P

 

I started using the extended Mobil 1 with the K&N filter. Change the filter after 3k and top off with fresh oil. Full change at 6k.

 

I recently switched over to the mobil 1 extended oil also, I think the car runs smoother, but that's just me, my evo is worth that extra $1 to spend on her.