Changed oil brand, now PCV catch can collects much more oil!
07-17-2003, 03:29 PM
#1
TECH Regular
Thread Starter
Join Date: Nov 2001
Posts: 409
Likes: 0
Received 0 Likes
on
0 Posts
Changed oil brand, now PCV catch can collects much more oil! For the first 2000 miles on my 427 I was running Castrol GTX 20w50. I recently switched to Mobil 1 15w50, and now my Greddy PCV catch can gets completely filled with oil in less than 500 miles. When I was using Castrol the catch can was only 1/4 filled after 1000 miles. My driving habits were the same with both oils.
What does that really mean???!!!
What does that really mean???!!!
07-17-2003, 04:23 PM
#2
TECH Veteran
Join Date: Aug 2002
Location: Hartsdale, NY
Posts: 4,055
Likes: 0
Received 0 Likes
on
0 Posts
Re: Changed oil brand, now PCV catch can collects much more oil! Not sure...???
Do you also have an LS6 valley cover? I was sucking a lot of oil before I installed the valley cover so you may want to consider this...
Do you also have an LS6 valley cover? I was sucking a lot of oil before I installed the valley cover so you may want to consider this...
07-19-2003, 09:48 PM
#4
TECH Fanatic
Join Date: Dec 2002
Location: Bring it........ b*tch
Posts: 1,084
Likes: 0
Received 0 Likes
on
0 Posts
Re: Changed oil brand, now PCV catch can collects much more oil! Well,
The Castrol oil you were using was quite thick, then you switched to a thinner oil. I guess it makes sense that the thinner oil is more easily sucked through the PCV system.
The Castrol oil you were using was quite thick, then you switched to a thinner oil. I guess it makes sense that the thinner oil is more easily sucked through the PCV system.
07-20-2003, 12:34 AM
#5
Re: Changed oil brand, now PCV catch can collects much more oil! Technically, a 20w-50 and a 15w-50 should both be 50 wieght (at 180 degrees as I remember). The 20w or 15w is the winter rating, it shows the temp that the oil will "pump" at (it has to be converted, 15w50 is not 15 degrees, I think it is about -10, but I can't find my chart). However, synthetic oil seems to run slightly "thinner" at the same temp as a similar conventional oil. The potential for a slight loss of viscosity may be to blame for the bulk of your problem...or it may not....Just my thoughts.