Fella's,
Whats your thoughts on using Penrite Racing 10 Tenths 15w/50 in a pair of 2006 8.1 Mercruisers (with oil coolers but no cats).
Specs are as follows:
Kinematic, cSt
at 40°C 114
at 100°C 17.5
VI 169
Ca 2960 PPM
Boron 630 PPM
Zn 1680 PPM
Phos assumed at 90% Zn 1,512 PPM
Noack 5
Base Number 9.8
HTHS 5.28cP
SN/CF A3/B3 rated and can be used in light duty petrol and diesel engines up to 2008 where A3/B4 is specified.
Claims to be shear free with no friction modifiers with POA and Esters.
Claims to be suitable for "normal" on road applications in a wide range of vehicles which suggests it would have a normal service life as also suggested by the base number and HTHS.
Suggests can be used where 15/40 or 20/40 oils are specified so it's closely in line with the Mercruiser spec'd 25/40 oil.
Currently using the Mercruiser 25/40 synth blend and previously the 25/40 mineral. In both cases the 8.1's start to use oil after about 20 hours and progressively gets worse (although with normal usage) until the next change. I'm assuming the oil is shearing and thinning over the year. Comments from other boaters indicate this oil shears to a 20w with nominal use.
I've read where others boaters has switched to Mobil 1 15/50 in these motors and consumption stops although reports also shows the 15/50 still does shears to a 30w.
Do approx 50 - 70 hours a year
Local temps don't go below 0 degrees C and up to 40 to 45 degrees C.
The oil is cheaper than Mobil 1 and Amsoil equivalents and also the Mercury 25/40. Yes the diesel/API rated oils from the majors are cheaper.
On paper this oil looks to be up to the task.
Thoughts, comments and advice welcome.
Whats your thoughts on using Penrite Racing 10 Tenths 15w/50 in a pair of 2006 8.1 Mercruisers (with oil coolers but no cats).
Specs are as follows:
Kinematic, cSt
at 40°C 114
at 100°C 17.5
VI 169
Ca 2960 PPM
Boron 630 PPM
Zn 1680 PPM
Phos assumed at 90% Zn 1,512 PPM
Noack 5
Base Number 9.8
HTHS 5.28cP
SN/CF A3/B3 rated and can be used in light duty petrol and diesel engines up to 2008 where A3/B4 is specified.
Claims to be shear free with no friction modifiers with POA and Esters.
Claims to be suitable for "normal" on road applications in a wide range of vehicles which suggests it would have a normal service life as also suggested by the base number and HTHS.
Suggests can be used where 15/40 or 20/40 oils are specified so it's closely in line with the Mercruiser spec'd 25/40 oil.
Currently using the Mercruiser 25/40 synth blend and previously the 25/40 mineral. In both cases the 8.1's start to use oil after about 20 hours and progressively gets worse (although with normal usage) until the next change. I'm assuming the oil is shearing and thinning over the year. Comments from other boaters indicate this oil shears to a 20w with nominal use.
I've read where others boaters has switched to Mobil 1 15/50 in these motors and consumption stops although reports also shows the 15/50 still does shears to a 30w.
Do approx 50 - 70 hours a year
Local temps don't go below 0 degrees C and up to 40 to 45 degrees C.
The oil is cheaper than Mobil 1 and Amsoil equivalents and also the Mercury 25/40. Yes the diesel/API rated oils from the majors are cheaper.
On paper this oil looks to be up to the task.
Thoughts, comments and advice welcome.
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