Definitive answer on JLR spec oil.

From the technical team at BG Petrospecs:

ACEA A1/B1 was first introduced into the ACEA Oil Sequences in 2004, however, it is based upon the original ACEA A1 and ACEA B1 sequences that were introduced in 1996. SO you can see this is a very old specification. Prior to ACEA 2008, ACEA A1/B1 was usually coupled with the Ford specification, WSS-M2C913-B.

Here are the dots that connect why BG 729 can be used in place of the Land Rover engine oil.

https://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/33B3BFD1858D410380257F38004D2C34/$File/BPXE-A68K67.pdf


ST JLR.51.5122 specification 0W-20 is suitable for use in automotive gasoline engines where the manufacturer recommends the ACEA A1/B1 specification.

ACEA A1/B1 oils are Mainline lubricants. They are designed for use in gasoline light duty engines that have been specifically designed to use a low viscosity oil.

ACEA A1/B1 oils are typically used in older vehicles as they do not provide the minimum performance demanded by newer API or ACEA OEM specifications.

Since BG 729 provides the highest API oil protection that is required by model year 2019 and previous specs, by default BG 729 0W-20 would fulfill the performance of the older ACEA A1 B1 (JLR 51.5122 specification).

BG only sells to repair shops and dealerships.

Land Rover uses their induction cleaning kits(fuel rail and intake) and I know of at least one dealership that uses their ATF.

Our rep is delivering 0/20 this week. I will post up a price if you are interested I can ship to you.