>1. Do those of you that believe in Mobil 1 like the 10-30W,
>15-50w, or a half & half mixture since I can't find 10w-40w?
I'm having good results with 15-50
>2. Is the Mobil 1 oil filter really better than the Fram or
>AC or others? If so what is a good part number?
That's the consensus of the group but I've never tried one yet. Auto Zone
didn't have one when I needed it.
>3. What are name brand oil filter numbers that fit the GMC
>455 for '77? What is number of the large capacity Napa?
Filter, Oil, 455 & (77) 403 Engine
GMC 78Z Parts
Book 6437994
AC
Delco
PF-24
Atlas
G-69
ram
PH-25
astings
%222
ee
LF-24
otorcraft
FL-9
APA
1258
urolator
PER-33
hell
S-16
exaco
T- 16
nion
PF-24
ix
51258
>15-50w, or a half & half mixture since I can't find 10w-40w?
I'm having good results with 15-50
>2. Is the Mobil 1 oil filter really better than the Fram or
>AC or others? If so what is a good part number?
That's the consensus of the group but I've never tried one yet. Auto Zone
didn't have one when I needed it.
>3. What are name brand oil filter numbers that fit the GMC
>455 for '77? What is number of the large capacity Napa?
Filter, Oil, 455 & (77) 403 Engine
GMC 78Z Parts
Book 6437994
AC
Delco
PF-24
Atlas
G-69
ram
PH-25
astings
%222
ee
LF-24
otorcraft
FL-9
APA
1258
urolator
PER-33
hell
S-16
exaco
T- 16
nion
PF-24
ix
51258