Thanks for keeping this thread alive. I like your suggestion of Rotella T6 15W-40 and I can't imagine why the 8.1L wouldn't be very healthy and happy living with this oil.
For the time being I did the winterization oil change with Valvoline VR1 Racing SAE 40 High Performance High Zinc Motor...
My next oil change is coming up soon and still wondering if Amsoil AEQT 0W-20 synthetic with MB229.71 approval might be a good choice for my situation? My JLR 5.0 SC V8 has increased output (600hp) and is often used to tow a trailer. Oil change cost, marginal fuel efficiency gains and long OCIs...
@DuckRyder yes, as far as I know my marine 8.1 is mechanically the same as the 8.1L Vortec in GM trucks.
I can understand Indmar wanting to avoid old 10W40 and 15W40 dino oils with lots of viscosity improvers but surely we've moved past that with high-quality multi-grade synthetics.
My...
My wake surf boat has a 2007 GM Vortec Indmar 8.1L L18 (~300hrs on it) that was originally spec'd for 15W40 oil but Indmar later amended the spec to straight 40WT. I contacted Indmar asking which synthetic oil they recommend and their answer was "We don't recommend using synthetic oil in that...
Amsoil is mostly off my radar but in the search for an oil with the highest levels of engine wear protection this is an interesting question.
Any thoughts on using EQT 0W-20 synthetic with MB229.71 approval in the JLR 5.0 V8?
Accoridng to one UK Land Rover oil supplier
"Castrol Edge Professional E C5 0W-20 has been superseded by the new and improved product - CASTROL EDGE PROFESSIONAL EC 0W-20"
Castrol EDGE Professional EC 0W-20 is suitable for use in automotive gasoline and diesel engines where the manufacturer...
I found this.
"This whole thing about better flow being more beneficial is bunk information. MOFT is how lubrication protects parts. If low viscosity flow is king for protection against wear, then why haven't we been running straight 0 weight oil for the past twenty years? Because we need...
I am searching for the holy grail of 0W-20 synthetics for my JLR 5.0 SC V8 that calls for STJLR 51.5122. I believe Castrol EDGE Professional E C5 0W-20 is the JLR dealer oil but some of the more attractive alternatives are Castrol Edge Extended-Performance (EP) 0W-20 SP (-39C PP which isn't...
Bringing this one back. Looking for the most wear protection possible over a 6k drain interval. The warranty has expired so approvals aren't a concern.
The MY2015+ factory oil is Castrol EDGE Professional E 0W-20 "approved for use in Jaguar and Land Rover vehicles that require a lubricant with...
Originally Posted by LS_Powah
Thanks everybody for the suggestions and discussion.
I ended up changing it all from Mobil 1 0w-20 (about 300 miles on it) to Pennzoil Platinum 5W30 HM. Quickly quiet on start up, and immediately quiet on the next cold startup (20 degree F) as well. Thanks for...
Originally Posted by oil_film_movies
About the same specs as Castrol Edge black jug/bottle 0w40, only this is much more expensive.
Castrol doesn't publish HTHS or Noack for their EDGE 0W-40 A3/B4. I would love to compare both these specs to the Motul 0W-40 X-max.