Engine Oil

[A//// Guy]

Ive heard Shane say numerous times that Mobile one is too thin and ruins bearings. For normal cars that are more reserved im sure its fine, but highly modified cars have issues?

[Matt D.]

Ive heard Shane say numerous times that Mobile one is too thin and ruins bearings. For normal cars that are more reserved im sure its fine, but highly modified cars have issues?
I don't know that it's too thin so much as people making north of 400whp are not using thicker oil. More power requires more protection any way you look at it.

[Kracka]

Ive heard Shane say numerous times that Mobile one is too thin and ruins bearings. For normal cars that are more reserved im sure its fine, but highly modified cars have issues?
I don't buy his thinking on that. Plenty of high-power track Subarus down here run Mobil 1 5W-30. Subarus do have oil over-heating issues though which is going to be magnified while sitting stationary on the dyno; that will wreck a bearing real quick under high-load no matter what brand of oil you're running.

[C3L1CA]

I've seen a lot of subaru's with spun bearings on Shane's dyno that have used mobil 1.

I've always used Mobil 1 10w30 in my dsm, however I think I'm going to change to something new this year. If I blow up, I'll let you guys know. haha

[Febo]

Ahh okay Thanks. Is there really any advantage to using non-detergent oil? it seems like the stuff with it is healthier for the engine, and lasts longer. :rock2:

There is a reason they switched to detergent oils. That reason is because non-detergent oils don't clean the sludge out of your engine. Sludge = bad, we all know this. For a modern engine I would recommend sticking with detergent oils.

(2) I was told not to really change from (x brand) to (x brand) because of the different "ingrediants" they use for each oil...is this true? Is that why when a few of us change to different oils, there's suddenly an issue?

This doesn't really matter. Additives are all relatively the same. Obviously some are higher quality, or are a lot more robust then others. But additives are only making up 20% of your oils composition. It's the other 80% you need to worry about, such as paraffin levels, quality of the refining, etc. Penzoil for instance is IMO the worst oil out there, especially at the conventional level. Their paraffin content is too high and leads to massive sludge.

Ive heard Shane say numerous times that Mobile one is too thin and ruins bearings. For normal cars that are more reserved im sure its fine, but highly modified cars have issues?

I'm in agreeance with matt on this one peter. I'd say its more the fault of not going thick enough, like uping to a 5w40 or 10w40. Altho FP did show that just by switching to Mobil 1 they managed to scorch a thrust bearing.

[A//// Guy]

Im just stating what Ive heard, and wanted Shane to chime in with his thoughts. I would agree oil weight def matters.

Ill stick with castrol though, to each their own.

[Halon]

Shane isn't the first person to say that either. I've heard that same comment quite a bit, and with all the failures I've seen with people running it, I will personally never run it. But to each their own :)

[Kracka]

Altho FP did show that just by switching to Mobil 1 they managed to scorch a thrust bearing.
Odd how it's only FP turbos failing while all the OEM bearing turbos are holding up just fine without fancy oil feed lines and expensive oils ;)

If you compare the wear protection specs of Mobil 1 5W-30 vs. Amsoil's you'll notice they are almost identical. The reason you see more Mobil 1 engines blowing up is because more people run it, simple statistics.

[Febo]

If you compare the wear protection specs of Mobil 1 5W-30 vs. Amsoil's you'll notice they are almost identical. The reason you see more Mobil 1 engines blowing up is because more people run it, simple statistics.

If we are comparing wear protection then Mobil 1 loses hard. Castrol Syntec has 8 times advertised wear protection, while my boys at Valvoline market 4 times the protection (supposedly upwards of 8, but they chose the lowest denominator for marketing purposes, dont wanna get sued now)

Back in the day M1 was pretty much king shit, now-a-days there are far better alternatives. M1 just has the name going for them. Makes the dumb majority of car buyers feel special.

[Kracka]

LOL @ everyone claiming they have billion times more wear protection. Marketing hype at it's finest. The 3/4 ball wear tests mean nothing, it's a test that was designed for testing gear oil, not engine oil.

(sorry in advance for the goofy formatting, I bolded M1 numbers to make it a bit easier to read)

Mobil 1 10W-30 Amsoil XL 10W-30
Viscosity @ 100ºC: 10.7 10.5
Viscosity, @ 40ºC: 65.3 63.6
Viscosity Index: 154 155
HTHS Viscosity: 3.26 3.2
Pour Point, ºC: -39 -40
Flash Point, ºC: 230 232

When you compare these actual technical specs (i.e. not laboratory tests paid for by Amsoil) you can see how nearly identical these oils are.