Do u guys recommend me to swtich to synthetic? I did a compression test on my teggy and came
#1 220 #2 220 #3 222 #4 220
The gsr now has 111k now, I had used Castrol Hi Mileage since I bought it.

 

Compression numbers look good.

I would stick with Castrol High Mileage.

 

High milage blends are a joke...just keep you oil changed regularly.

 

#s are very good.. basically same as my jdm motor with only 40k! i'd stick with whatever you've been using.. the castrol i guess & save money

 

At 111k, stick with conventional oil. A switch to synthetic at such high mileage may result in the detergents in the synthetic oil breaking the gunk that has formed in small cracks in seals over time, causing leaks. If it aint broke dont fix it.

 

Thanks for the info guys...anybody else's uses castrol? what would u suggest for the winter 10-40w?
I was told for my high mileage I should use 20-50w?

 

Youre in Pheonix? Id run 5w30 year round.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 9000rpms &raquo;</TD></TR><TR><TD CLASS="quote">High milage blends are a joke...just keep you oil changed regularly.</TD></TR></TABLE>

no they are not. they have are better than regular oil. thicker viscosity as well as some esters present in the blend.

stick with castrol HM 10w-30 year round....

 

stick with conventional oil in a 5W30 ..... 20w50 will just starve your engine of oil sense it is so thick


edit and btw those are great compression #'s

 

just stick with the high mileage oil. it is not a GF-4 energy conserving oil like the 30wt. conventional oil. HM oils has a thicker viscosity than conventionals which will give you that extra bit of cushion before the oil drops out of grade due to high temperatures. as oil temperature increases, the viscosity of motor oil decreases.

 

Thanks primo.