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| Parameter | Previous Formula | Updated Formula | Improvement | |------------------------|------------------|----------------|-------------| | Four-Ball Wear Scar | 0.52 mm | 0.41 mm | -21% | | Oxidation Stability (TOST) | 3,500 hrs | 4,800 hrs | +37% | | Foam Tendency (Seq II) | 50/0 | 20/0 | -60% |
Reddit’s r/OilNerds and the Bob Is The Oil Guy forum have exploded with threads about the updated blend. Here is a summary of consensus feedback:
One verified buyer, @JennyCustomUser, wrote: "I ran the original for 20k miles. The updated version feels like a different league. My valvetrain noise on a 5.3 LM7 with 180k miles? Gone. But the price tag hurts."
“I was running Liqui Moly in my 2023 GR Corolla. Switched to Xam 5W-30 + Jenny-B. The valvetrain chatter at hot idle disappeared. My oil analysis from Blackstone Labs showed silicon levels dropped by 60%—better filtration compatibility.” — Mark T., Track Day Enthusiast xam+jenny+custom+oil+updated
“The old Jenny mix used to leak past my rear main seal on my LS3. I don’t know what they changed in the updated additive, but the seal swell is real. No more drips. Magic.” — Sofia R., Drift Build
“I run a 1,000hp Supra. I change oil every 4 events. The updated Xam comes out looking honey-colored, not black. That’s ester chemistry at work.” — Darren K., Tuner
Not everyone. Here is the target audience for the xam+jenny+custom+oil+updated search: | Parameter | Previous Formula | Updated Formula
The updated Xam + Jenny custom oil is not universal. Avoid using it if:
One major update in the 2026 blend is the NOACK volatility score. The old Xam + Jenny mix scored ~11% (good). The updated mix scores 7.8% . This means significantly less oil vaporization in high-heat environments (think track days or towing up mountain passes).
This is where personalization happens. The updated Jenny system allows for three sub-profiles: One verified buyer, @JennyCustomUser , wrote: "I ran
Before diving into the "updated" specifications, let’s establish a baseline. Xam + Jenny Custom Oil is not your off-the-shelf synthetic. It is a tailor-made lubricant solution designed for specific engine tolerances, climate conditions, and performance demands.
Together, the "Xam + Jenny" moniker represents a synergistic hybrid: the chemistry of Xam combined with the custom viscosity mapping of Jenny.