Royal purple 0-8w.

Rich Biebel · 01-30-2019, 09:04 AM

I once tried RP very thin oil in my Firebird Stocker.

Oil pressure would drop to near zero at low engine rpms...

I Dumped that oil out after 1 race weekend.....and it was no faster than what I was using before.....Mobil 1 10-30 or 5-30.....and oil pressure was always good with the Mobil 1 and it was faster than most other typical oils.....

Ed Wright · 01-30-2019, 10:10 AM

I'm guessing you had a lot of bearing & internal oil pump clearances. Even with my Sherman low volume oil pump, my oil pressure at an idle would drop to 15 psi, after a pass, when the oil was warmed up. Never saw mine drop to zero. I run my stuff fairly tight.

01-30-2019, 09:04 AM	#1
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: Royal purple 0-8w. I once tried RP very thin oil in my Firebird Stocker. Oil pressure would drop to near zero at low engine rpms... I Dumped that oil out after 1 race weekend.....and it was no faster than what I was using before.....Mobil 1 10-30 or 5-30.....and oil pressure was always good with the Mobil 1 and it was faster than most other typical oils..... __________________ Rich Biebel S/C 1479 Stock 147R

01-30-2019, 10:10 AM	#2
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Royal purple 0-8w. I'm guessing you had a lot of bearing & internal oil pump clearances. Even with my Sherman low volume oil pump, my oil pressure at an idle would drop to 15 psi, after a pass, when the oil was warmed up. Never saw mine drop to zero. I run my stuff fairly tight. __________________ Ed Wright 4156 SS/JA

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode