OZ Tuned 2014 Cruze Diesel (Opel A20DTH) - RLI Biosyn HD SAE 30 - 14,000 Miles & 2.3 years

[CleverUserName]

This is RLI HD SAE 30, not 10w30 as stated in the report. I only had a gallon of it, so 0.75 qts of RLI 15w40 topped it off. Using the widman site, the combined 100c viscosity should have been ~ 11.3 cSt.

What can I say, FANTASTIC! This is the best run so far. I know metal ppm aren't indicative of wear, however this is the longest I've ever ran Biosyn and also has the lowest wear metals. SAE 30 is fine for me, I live in California. The spec sheet suggests this is likely a monograde that meets 10w30 winter rating like Amsoil ACD did.

The oil is definitely beginning to age as it has thickened and oxidation value increased. It was also in the sump for 29 months.

Good combustion, soot is < 0.1%. I use amalgamated TDR-FL at every fill up and primarily B5, Diesel #2 and D2/Renewable Diesel blends.

My original plan was to eventually get to 15K miles on Biosyn in this car, however I don't have any more Biosyn and the cost is around $70/gallon now, the experiment is over unfortunately unless someone wants to donate another 5 quarts in the name of science!

Car details:

2014 Cruze Turbo diesel. This has the Opel A20DTH engine and Aisin AF40 transmission. It has the original emissions compliant Fleece/OZ 200hp & 320tq tune.
-96K miles
-Consistently gets 40 MPGs average per tank and over 50 on the freeway at 70 MPH.
-Lowered with Bilstein B8 & Eibach spring kit. Whiteline bushings, end links and RSB.
-18" AR wheels and 225/50R18 V-rated Yokohama Avid Ascend GTs.

I love this car for it's torque and FE however parts are getting difficult to find as many unique parts are NLA.

Refilled with Amsoil ACD SAE30 + RLI Booster Pak. I will push this to 15K.

 

[fantastic]

Excellent run! Low wear metals & Si is low. Don't see Antimony very often in engine oil or anyone using mono 30 in for that matter but you have the climate to do so. After diesel gates they all pulled the plug on diesels in cars. Not as profitable as diesels in trucks. Wish they'd have kept offering diesels.

 

[CleverUserName]

Excellent run! Low wear metals & Si is low. Don't see Antimony very often in engine oil or anyone using mono 30 in for that matter but you have the climate to do so. After diesel gates they all pulled the plug on diesels in cars. Not as profitable as diesels in trucks. Wish they'd have kept offering diesels.

All Renewable Lubricants Biosyn XTRA oils use antimony DTC as the secondary AW/AF additive.

RLI says this HD SAE 30 is good to -20F. It is basically an SAE 30 with cold flow performance of a 10w30.

It's an alternative to Amsoil ACD SAE 30 which was discontinued a few years ago.

 

[fantastic]

All Renewable Lubricants Biosyn XTRA oils use antimony DTC as the secondary AW/AF additive.

RLI says this HD SAE 30 is good to -20F. It is basically an SAE 30 with cold flow performance of a 10w30.

It's an alternative to Amsoil ACD SAE 30 which was discontinued a few years ago.

I think you've explained that before but I'd forgotten & that is a good reminder. I'm all for it (bio oils, alt fuels, etc.).

If you used:
Bio-SynXtra™ HD Plus SHP Motor Oil SAE 15W40 (Low Ash) it has a Viscosity @ 100c of 15.2
Bio-Fleet™ HD HP Motor Oil SAE 15W40 has a viscosity @ 100c of 15.0

That is on the high end of a 40 grade & would explain the higher viscosity results along with 14k miles most likely increased its viscosity. Still I think it handled the mileage well.

 

[CleverUserName]

I think you've explained that before but I'd forgotten & that is a good reminder. I'm all for it (bio oils, alt fuels, etc.).

If you used:
Bio-SynXtra™ HD Plus SHP Motor Oil SAE 15W40 (Low Ash) it has a Viscosity @ 100c of 15.2
Bio-Fleet™ HD HP Motor Oil SAE 15W40 has a viscosity @ 100c of 15.0

That is on the high end of a 40 grade & would explain the higher viscosity results along with 14k miles most likely increased its viscosity. Still I think it handled the mileage well.

Never used the bio-fleet, I think it's a syn blend or conventional bargain product.

I don't prefer or seek out bio products, the RLI is a high performance product that happens to use some vegetable based group V base oils. Nothing compares to their performance except maybe redline HP. This was testing I was doing to see if RLI HD oils had the potential to last for 15K miles without a hard fail.

I mixed in the BioSyn XTRA HD 15w40 synthetic. Terry Dyson tested this oil and the results were posted on his oil forum many years ago. It has a stout HTHS of 5.2

RLI HD SAE 30 has a viscosity of 10.7 cSt and HTHS is advertised at > 2.9 cP which isn't high enough for my Cruze. You need to add the 15w40 to get the viscosity and HTHS up to minimums for this car. When mixed together the combined viscosity should have been ~11.3 which puts the HTHS > 3.5.

It thickened up 2 cSt which is what I assume is from oxidation, not from mixing.

 

[fantastic]

I know there's another fella on here that uses bio oils so I must of been mixed up. What do you plan to use after your supply of Amsoil ACD is used up (discontinued)?

 

[CleverUserName]

I know there's another fella on here that uses bio oils so I must of been mixed up. What do you plan to use after your supply of Amsoil ACD is used up (discontinued)?

I only had a gallon of ACD, its the last run on that.

I have a few jugs of Ravenol NDT 5w40, I'll probably put that in the Cruze for the next few OCIs.