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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...

Thanks for the replies. Can anyone think of a reason why 40WT Dino oil would be better than Rotella 15W40 synthetic for this application?

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Accoridng to one UK Land Rover oil supplier "Castrol Edge Professional E C5 0W-20 has been superseded by the new and improved product - CASTROL EDGE PROFESSIONAL EC 0W-20" Castrol EDGE Professional EC 0W-20 is suitable for use in automotive gasoline and diesel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...

Are you advocating for moving to a heavier oil with higher HT/HS or suggesting I stick with a JLR spec for... ?

Fuel economy, in as much as a different oil will influence it, isn't on my radar for this vehicle. I will expand my search to 0W-30 oils.

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...

Grrrrrrrrrreat now for some more sleepless nights https://www.bobistheoilguy.com/foru...n-turbo-oil-for-summer-track#Post5011042

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.

Originally Posted by OVERKILL I honestly don't think you'd see any The AFE 0w-30 ended up being the best oil for our Expedition. Thanks for the feedback. Since 0W-20 is the factory spec for my engines maybe I will make a subtle change and use Mobil 1 AFE with a 50/50 mix of 0W- 20 and 30...

Everyone here has been very patient with me, especially 1JZ_E46 and edyvw. Since most of the contributors in this thread know more about oil than I do I will defer to the recommendations that have been made and I think everyone here will agree that my S55 engine should stay healthy with 5k OCIs...

Quote LL01 has minimum requirement of 3.5cp. So doesn't that mean that a standard BMW-branded 0W-30 could have nearly the same HTHS as these 40wt oils? Mobil1 FS 0W-40 3.6 P Platinum Euro 5W-40 3.6 Castrol Edge 0W-40 = unknown but I read somewhere 3.6 If HTHS is a good barometer for how the...

@555 no bicycle rides during my track days Advanced/Instructor group at 10.5/10ths! After all of the very helpful replies in this thread the only thing that has me not completely sold on M1 FS 0W-40, Castrol Edge 0W-40 or Pennzoil Platinum Euro 5W-40 is their HTHS is virtually the same as...

After some soul searching I would like an HTHS close to 4.0 since the original LL-01 0W-30 spec is as high as 3.5.......but I also need to stop thinking about oils and just fill the sump with M1 FS 0W-40 or Pennzoil Platinum Euro 5W-40 ......then I stumbled on this Motul and the specs look...