CLASS RACER FORUM - View Single Post

brian schuetta · 04-03-2017, 02:06 PM

Haven't heard the noise since I started this thread. Now a different but similar subject, what viscosity oil should I be using in an engine with this many miles? When new it used 5W30, at 150K switched to 10W30. Should I go to a heavier oil? Using Castrol Hi Mileage type.

04-03-2017, 02:06 PM	#1
brian schuetta Member Join Date: Apr 2005 Location: san antonio tx Posts: 259 Likes: 5 Liked 28 Times in 15 Posts	Re: 5.3 LS Top End Noise Haven't heard the noise since I started this thread. Now a different but similar subject, what viscosity oil should I be using in an engine with this many miles? When new it used 5W30, at 150K switched to 10W30. Should I go to a heavier oil? Using Castrol Hi Mileage type.