Oil type/use question

[zrayr]

Originally Posted by blykins

".............Mark, I'd rather you not use synthetic oil at all in this engine. I like the higher viscosity/higher oil pressure................"

I use Mobil 1 15w-50 synthetic oil & couldn't ask for more oil pressure. Ignoring the significant advances in oil technology by advising against synthetic oils borders on willful ignorance.

Here's my oil pressure @ 75- 105 degrees F. air temp. with a 180 degree thermostat

cold engine:

pressure @ idle: 82 psi

hot engine:

idle (800 rpm) ...... 35 psi
1500 rpm ..............70 psi
2000 rpm ..............72 psi
2500 rpm ..............75 psi
3000 rpm ............. 80 psi
3500 rpm ............. 82 psi
4000 rpm ............ 85 psi
5000 rpm ............ 85 psi
6000 rpm ............ 85 psi
6500 rpm ............ 85 psi

Z.

[blykins]

If you noticed his first post, you'll see that he was dealing with 5W and 0W oil...most certainly, he'd have higher oil pressures with a 15W-50 synthetic oil in comparison to those. However, he had a surplus of oil that he was wanting to use.

Regardless, I recommend customers to use the good ole fashioned non-synthetic in my engines.

[Got the Bug]

Originally Posted by blykins

If you noticed his first post, you'll see that he was dealing with 5W and 0W oil...most certainly, he'd have higher oil pressures with a 15W-50 synthetic oil in comparison to those. However, he had a surplus of oil that he was wanting to use.

Regardless, I recommend customers to use the good ole fashioned non-synthetic in my engines.

I'm with you. Unless the manufacturer specifically calls out synthetic (i.e. My wife's MBZ), I'm going to stick with non synthetic for my Roush.

[mkassab]

Good opinions by all, and thanks for the feedback.

I will use dino oil for these key reasons: 1. I'll only put 1 or 2k miles per year, 2. I'll change oil annually in the fall, 3. for a few k miles and higher cost of sync oil it just makes NO sense to use sync oil (with very little or no benefit).

The only reason I started this thread was I had sync oil from a previous car.

thanks all again.... Mark

[RodKnock]

Originally Posted by zrayr

Ignoring the significant advances in oil technology by advising against synthetic oils borders on willful ignorance.

Oye vey. This is why I don't like oil threads. Folks quote studies, with elaborate statistical evidence, but don't know who paid for them or if the people are even qualified to perform a study. Who knows, maybe they're biased, maybe they're not. Maybe they're right, maybe they're not.

Then folks go ahead and call me and others names, like "bordering ignorant", because we prefer dino oil in our engines or even, for heaven's sake, 15W-50 grade dino oil.

The Buddha said (paraphrasing) "Don't believe everything you read."